Client Partner Implementation Outline#
Client Search Scenario#
All Connected Data Asset clients are, at their core, just conventional OpenSearch clients with a few extensions and conventions to make the CEOS OpenSearch protocol useful in the WGISS environment. The IDN identifier of the collection of interest is a mandatory element in CEOS OpenSearch request. Clients could retrieve the collection ID from the IDN OpenSearch Description Document (OSDD).
This chapter will give brief steps about how to retrieve an IDN collection ID and how to interact with the granule search server for inventory search. The corresponding details are elaborated in the Use Case chapters.
Data providers will have registered the metadata of their archived collections into the IDN. The client can query the IDN to retrieve the IDN collection ID for a desired collection of interest and, based on that collection ID and other spatial-temporal query conditions, build a valid CEOS OpenSearch query. The following steps describe the client search scenario starting with IDN OpenSearch.
Step 1
Obtain the IDN OpenSearch OSDD to formulate a valid IDN OpenSearch request.
The OpenSearch Description Document is accessible at the fixed location https://cmr.earthdata.nasa.gov/opensearch/collections/descriptor_document.xml?clientId=ceosOpenSearchDoc and contains the URL template to be used for collection search.
<?xml version="1.0" ?><os:OpenSearchDescription xmlns:os="http://a9.com/-/spec/opensearch/1.1/" xmlns:echo="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:geo="http://a9.com/-/opensearch/extensions/geo/1.0/" xmlns:time="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:params="http://a9.com/-/spec/opensearch/extensions/parameters/1.0/" xmlns:referrer="http://www.opensearch.org/Specifications/OpenSearch/Extensions/Referrer/1.0" xmlns:eo="http://a9.com/-/opensearch/extensions/eo/1.0/" xmlns:atom="http://www.w3.org/2005/Atom">
<os:ShortName>CMR Collections</os:ShortName>
<os:Description>NASA CMR Collection search using geo, time and parameter extensions</os:Description>
<os:Contact>echodev@echo.nasa.gov</os:Contact>
<os:Url type="application/atom+xml" rel="collection" params:method="GET" template="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword={os:searchTerms?}&instrument={echo:instrument?}&satellite={eo:platform?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&hasGranules={echo:hasGranules?}&isCwic={echo:isCwic?}&isGeoss={echo:isGeoss?}&isCeos={echo:isCeos?}&isEosdis={echo:isEosdis?}&isFedeo={echo:isFedeo?}&provider={echo:provider?}&clientId=ceosOpenSearchDoc">
<params:Parameter name="keyword" uiDisplay="Search terms" value="{os:searchTerms}" title="Inventory with terms expressed by these search terms" minimum="0">
<atom:link rel="profile" href="http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html" title="This parameter follows the elastic search free text search implementations"/>
</params:Parameter>
<params:Parameter name="instrument" uiDisplay="Instrument" value="{echo:instrument}" title="Inventory associated with a satellite instrument expressed by this short name" minimum="0"/>
<params:Parameter name="satellite" uiDisplay="Satellite" value="{eo:platform}" title="Inventory associated with a Satellite/platform expressed by this short name" minimum="0"/>
<params:Parameter name="boundingBox" uiDisplay="Bounding box" value="{geo:box}" title="Inventory with a spatial extent overlapping this bounding box" minimum="0"/>
<params:Parameter name="lat" uiDisplay="Latitude" value="{geo:lat}" title="Inventory with latitude in decimal degrees, must be used together with lon and radius" minimum="0" minInclusive="-90.0" maxInclusive="90.0"/>
<params:Parameter name="lon" uiDisplay="Longitude" value="{geo:lon}" title="Inventory with longitude in decimal degrees, must be used together with lat and radius" minimum="0" minInclusive="-180.0" maxInclusive="180.0"/>
<params:Parameter name="radius" uiDisplay="Radius" value="{geo:radius}" title="Inventory with the search radius in meters, must be used together with lat and lon" minimum="0" minInclusive="10" maxInclusive="6000000"/>
<params:Parameter name="geometry" uiDisplay="Geometry" value="{geo:geometry}" title="Inventory with a spatial extent overlapping this geometry" minimum="0">
<atom:link rel="profile" href="http://www.opengis.net/wkt/LINESTRING" title="This service accepts WKT LineStrings"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POINT" title="This service accepts WKT Points"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POLYGON" title="This service accepts WKT Polygons"/>
</params:Parameter>
<params:Parameter name="placeName" uiDisplay="Place name" value="{geo:name}" title="Inventory with a spatial location described by this name" minimum="0"/>
<params:Parameter name="startTime" uiDisplay="Start time" value="{time:start}" title="Inventory with a temporal extent containing this start time" minimum="0"/>
<params:Parameter name="endTime" uiDisplay="End time" value="{time:end}" title="Inventory with a temporal extent containing this end time" minimum="0"/>
<params:Parameter name="cursor" uiDisplay="Start page" value="{os:startPage}" title="Start page for the search result" minimum="0"/>
<params:Parameter name="numberOfResults" uiDisplay="Number of results" value="{os:count}" title="Maximum number of records in the search result" minimum="0" maxInclusive="2000"/>
<params:Parameter name="offset" uiDisplay="Start index" value="{os:startIndex}" title="0-based offset used to skip the specified number of results in the search result set" minimum="0"/>
<params:Parameter name="uid" uiDisplay="Unique identifier" value="{geo:uid}" title="Inventory associated with this unique ID" minimum="0"/>
<params:Parameter name="hasGranules" uiDisplay="Has granules" value="{echo:hasGranules}" title="Inventory with granules">
<params:Option value="true" label="Yes"/>
<params:Option value="false" label="No"/>
</params:Parameter>
<params:Parameter name="isCwic" uiDisplay="CWIC collection" value="{echo:isCwic}" title="Inventory related to CWIC">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isGeoss" uiDisplay="GEOSS collection" value="{echo:isGeoss}" title="Inventory related to GEOSS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isCeos" uiDisplay="CEOS collection" value="{echo:isCeos}" title="Inventory related to CEOS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isEosdis" uiDisplay="EOSDIS collection" value="{echo:isEosdis}" title="Inventory related to EOSDIS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isFedeo" uiDisplay="FedEO collection" value="{echo:isFedeo}" title="Inventory related to FedEO">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="provider" uiDisplay="Provider" value="{echo:provider}" title="Inventory associated with a provider" minimum="0"/>
<params:Parameter name="clientId" uiDisplay="Client identifier" value="{referrer:source}" title="Client identifier to be used for metrics" minimum="0"/>
</os:Url>
<os:Url type="text/html" rel="collection" params:method="GET" template="https://cmr.earthdata.nasa.gov/opensearch/collections.html?keyword={os:searchTerms?}&instrument={echo:instrument?}&satellite={eo:platform?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&hasGranules={echo:hasGranules?}&isCwic={echo:isCwic?}&isGeoss={echo:isGeoss?}&isCeos={echo:isCeos?}&isEosdis={echo:isEosdis?}&isFedeo={echo:isFedeo?}&provider={echo:provider?}&clientId=ceosOpenSearchDoc">
<params:Parameter name="keyword" uiDisplay="Search terms" value="{os:searchTerms}" title="Inventory with terms expressed by these search terms" minimum="0">
<atom:link rel="profile" href="http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-query-string-query.html" title="This parameter follows the elastic search free text search implementations"/>
</params:Parameter>
<params:Parameter name="instrument" uiDisplay="Instrument" value="{echo:instrument}" title="Inventory associated with a satellite instrument expressed by this short name" minimum="0"/>
<params:Parameter name="satellite" uiDisplay="Satellite" value="{eo:platform}" title="Inventory associated with a Satellite/platform expressed by this short name" minimum="0"/>
<params:Parameter name="boundingBox" uiDisplay="Bounding box" value="{geo:box}" title="Inventory with a spatial extent overlapping this bounding box" minimum="0"/>
<params:Parameter name="lat" uiDisplay="Latitude" value="{geo:lat}" title="Inventory with latitude in decimal degrees, must be used together with lon and radius" minimum="0" minInclusive="-90.0" maxInclusive="90.0"/>
<params:Parameter name="lon" uiDisplay="Longitude" value="{geo:lon}" title="Inventory with longitude in decimal degrees, must be used together with lat and radius" minimum="0" minInclusive="-180.0" maxInclusive="180.0"/>
<params:Parameter name="radius" uiDisplay="Radius" value="{geo:radius}" title="Inventory with the search radius in meters, must be used together with lat and lon" minimum="0" minInclusive="10" maxInclusive="6000000"/>
<params:Parameter name="geometry" uiDisplay="Geometry" value="{geo:geometry}" title="Inventory with a spatial extent overlapping this geometry" minimum="0">
<atom:link rel="profile" href="http://www.opengis.net/wkt/LINESTRING" title="This service accepts WKT LineStrings"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POINT" title="This service accepts WKT Points"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POLYGON" title="This service accepts WKT Polygons"/>
</params:Parameter>
<params:Parameter name="placeName" uiDisplay="Place name" value="{geo:name}" title="Inventory with a spatial location described by this name" minimum="0"/>
<params:Parameter name="startTime" uiDisplay="Start time" value="{time:start}" title="Inventory with a temporal extent containing this start time" minimum="0"/>
<params:Parameter name="endTime" uiDisplay="End time" value="{time:end}" title="Inventory with a temporal extent containing this end time" minimum="0"/>
<params:Parameter name="cursor" uiDisplay="Start page" value="{os:startPage}" title="Start page for the search result" minimum="0"/>
<params:Parameter name="numberOfResults" uiDisplay="Number of results" value="{os:count}" title="Maximum number of records in the search result" minimum="0" maxInclusive="2000"/>
<params:Parameter name="offset" uiDisplay="Start index" value="{os:startIndex}" title="0-based offset used to skip the specified number of results in the search result set" minimum="0"/>
<params:Parameter name="uid" uiDisplay="Unique identifier" value="{geo:uid}" title="Inventory associated with this unique ID" minimum="0"/>
<params:Parameter name="hasGranules" uiDisplay="Has granules" value="{echo:hasGranules}" title="Inventory with granules">
<params:Option value="true" label="Yes"/>
<params:Option value="false" label="No"/>
</params:Parameter>
<params:Parameter name="isCwic" uiDisplay="CWIC collection" value="{echo:isCwic}" title="Inventory related to CWIC">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isGeoss" uiDisplay="GEOSS collection" value="{echo:isGeoss}" title="Inventory related to GEOSS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isCeos" uiDisplay="CEOS collection" value="{echo:isCeos}" title="Inventory related to CEOS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isEosdis" uiDisplay="EOSDIS collection" value="{echo:isEosdis}" title="Inventory related to EOSDIS">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="isFedeo" uiDisplay="FedEO collection" value="{echo:isFedeo}" title="Inventory related to FedEO">
<params:Option value="true" label="Yes"/>
</params:Parameter>
<params:Parameter name="provider" uiDisplay="Provider" value="{echo:provider}" title="Inventory associated with a provider" minimum="0"/>
<params:Parameter name="clientId" uiDisplay="Client identifier" value="{referrer:source}" title="Client identifier to be used for metrics" minimum="0"/>
</os:Url>
<os:Query role="example" searchTerms="Amazon River Basin Precipitation, 1972-1992" title="Sample search"/>
<os:Attribution>NASA CMR</os:Attribution>
<os:SyndicationRight>open</os:SyndicationRight>
<os:Tags>CMR NASA CWIC CEOS-OS-BP-V1.1/L3 ESIP OGC collection pageOffset=1 indexOffset=0</os:Tags>
</os:OpenSearchDescription>
The OSDD may contain URL templates for multiple values for type (media types) and multiple values for rel (relations). The rel values have the following meaning (if present) as defined in [RD1]. :
rel |
description |
|---|---|
collection |
URL template to be used for collection search. |
results |
URL template to be used for granule search (default). |
service |
URL template to be used for service or application search. |
The current OSDD contains the following URL templates:
| rel | type | |
|---|---|---|
| 0 | collection | application/atom+xml |
| 1 | collection | text/html |
# find URL template for collection search
root = ElementTree.fromstring(response.text)
ns = {'os': 'http://a9.com/-/spec/opensearch/1.1/'}
collection_url_atom = root.find('os:Url[@rel="collection"][@type="application/atom+xml"]', ns)
collection_template = collection_url_atom.attrib['template']
collection_template
'https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword={os:searchTerms?}&instrument={echo:instrument?}&satellite={eo:platform?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&hasGranules={echo:hasGranules?}&isCwic={echo:isCwic?}&isGeoss={echo:isGeoss?}&isCeos={echo:isCeos?}&isEosdis={echo:isEosdis?}&isFedeo={echo:isFedeo?}&provider={echo:provider?}&clientId=ceosOpenSearchDoc'
Step 2
Search collections of interest through IDN OpenSearch with proper request parameters (e.g. spatial footprint, temporal extent and keyword).
request_url = get_api_request(collection_template, {'count': '10', 'searchTerms': 'Landsat*'})
request_url
'https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=Landsat*&numberOfResults=10&clientId=ceosOpenSearchDoc'
response = requests.get( request_url )
xmlstr = minidom.parseString(response.text).toprettyxml(indent=' ', newl='')
md("```xml\n" + xmlstr + "\n```\n")
<?xml version="1.0" ?><feed xmlns:relevance="http://a9.com/-/opensearch/extensions/relevance/1.0/" xmlns:os="http://a9.com/-/spec/opensearch/1.1/" xmlns:georss="http://www.georss.org/georss" xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:echo="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:esipdiscovery="http://commons.esipfed.org/ns/discovery/1.2/" xmlns:gml="http://www.opengis.net/gml" xmlns:time="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:eo="http://a9.com/-/opensearch/extensions/eo/1.0/" esipdiscovery:version="1.2">
<updated>2024-12-06T16:28:21.291Z</updated>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<title type="text">ECHO dataset metadata</title>
<subtitle type="text">Search parameters: keyword => Landsat*</subtitle>
<link href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml" hreflang="en-US" type="application/opensearchdescription+xml" rel="search"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=Landsat*&numberOfResults=10&clientId=ceosOpenSearchDoc" hreflang="en-US" type="application/atom+xml" rel="self"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=Landsat*&numberOfResults=10&clientId=ceosOpenSearchDoc&cursor=66" hreflang="en-US" type="application/atom+xml" rel="last"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=Landsat*&numberOfResults=10&clientId=ceosOpenSearchDoc&cursor=2" hreflang="en-US" type="application/atom+xml" rel="next"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=Landsat*&numberOfResults=10&clientId=ceosOpenSearchDoc&cursor=1" hreflang="en-US" type="application/atom+xml" rel="first"/>
<link href="https://wiki.earthdata.nasa.gov/display/echo/Open+Search+API+release+information" hreflang="en-US" type="text/html" rel="describedBy" title="Release Notes"/>
<os:Query xmlns:geo="http://a9.com/-/opensearch/extensions/geo/1.0/" role="request" os:searchTerms="Landsat*"/>
<os:totalResults>659</os:totalResults>
<os:itemsPerPage>10</os:itemsPerPage>
<os:startIndex>1</os:startIndex>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1965336923-ESA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>FEDEO</consortium>
<title type="text">Landsat 8 OLI-TIRS European Coverage</title>
<summary type="text">The European coverage of Landsat 8 data since the beginning of the mission until December 2014 is available on the Landsat 8 portal. Data shown on the portal: portal are reprocessed (Tier 1 and Tier 2) products acquired at ESA receiving stations (Neustrelitz, Matera and Kiruna visibility masks).: You can find the most recent data (from 2015 onwards) in the Landsat8 European Coverage Collection 2 Level 1 and Level2; as soon as the new collection is completely uploaded and the entire mission is covered, the former dissemination system for Collection 1 dataset will be dismissed. Landsat 8 level 1 products combine data from the two Landsat instruments, OLI and TIRS. The level 1 products generated can be either L1T or L1gT (30m resolution, 170 km x 185 km scene size): • L1T - Orthorectified products Level 1T data products consist of radiometrically corrected image data derived from L0 data scaled to at-aperture spectral radiance or reflectance that are resampled for registration to a cartographic projection (referenced to the WGS84, G873 or current version). The L1T product is orthorectified, and corrected for terrain relief. The geometric corrections use observatory ephemeris data and ground control points; DEM data is used to correct for terrain relief. • L1gT - Geometrically corrected products L1gT data products consist of L0 product data with systematic radiometric, geometric and terrain corrections applied and resampled for registration to a cartographic projection, referenced to the WGS84, G873, or current version. L1gT data products assume the use of on-board positional information or definitive ephemeris, as well as the use of controlled elevation data to correct for parallax errors. In case of insufficient GCP, caused by extensive snow/cloud cover, which makes the orthorectification impossible, products of this level are produced instead of L1T.</summary>
<updated/>
<link length="0.0KB" rel="enclosure" hreflang="en-US" href="https://fedeo-client.ceos.org?parentIdentifier=EOP:ESA:EARTH-ONLINE&uid=LANDSAT.OLI-TIRS.L1T_L1GT"/>
<link length="0.0KB" rel="enclosure" hreflang="en-US" href="https://fedeo.ceos.org/opensearch/request/?httpAccept=application/vnd.iso.19139-2%2Bxml&parentIdentifier=EOP:ESA:EARTH-ONLINE&uid=LANDSAT.OLI-TIRS.L1T_L1GT&recordSchema=iso19139-2"/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT.OLI-TIRS.L1T_L1GT_NA" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT.OLI-TIRS.L1T_L1GT"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1965336923-ESA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1965336923-ESA</dc:identifier>
<dc:date>2014-12-31T00:00:00.000Z/</dc:date>
<echo:datasetId>Landsat 8 OLI-TIRS European Coverage</echo:datasetId>
<echo:shortName>LANDSAT.OLI-TIRS.L1T_L1GT</echo:shortName>
<echo:versionId>NA</echo:versionId>
<echo:entryId>LANDSAT.OLI-TIRS.L1T_L1GT_NA</echo:entryId>
<echo:dataCenter>ESA</echo:dataCenter>
<echo:organization>ESA/ESRIN</echo:organization>
<echo:processingLevelId>1</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-35 -20 75 35</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine/>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
<echo:tag>
<echo:tagKey>int.esa.fedeo</echo:tagKey>
</echo:tag>
<echo:is_fedeo>true</echo:is_fedeo>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C2241716601-ESA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>FEDEO</consortium>
<title type="text">Landsat 8 Collection 2 European Coverage</title>
<summary type="text">This dataset contains the European Coverage of Landsat 8 Collection 2 data, both Level 1 and Level 2, since the beginning of the mission. Landsat 8 Collection 2 is the result of reprocessing effort on the archive and on fresh products with significant improvement with respect to Collection 1 on data quality, obtained by means of advancements in data processing, algorithm development. The primary characteristic is a relevant improvement in the absolute geolocation accuracy (now re-baselined to the European Space Agency Copernicus Sentinel-2 Global Reference Image, GRI) but includes also updated digital elevation modelling sources, improved Radiometric Calibration (even correction for the TIRS striping effect), enhanced Quality Assessment Bands, updated and consistent metadata files, usage of Cloud Optimized Georeferenced (COG) Tagged Image File Format. Landsat 8 level 1 products combine data from the 2 Landsat instruments, OLI and TIRS. The level 1 products generated can be either L1TP or L1GT: • L1TP - Level 1 Precision Terrain (Corrected) (L1T) products: Radiometrically calibrated and orthorectified using ground control points (GCPs) and digital elevation model (DEM) data to correct for relief displacement. The highest quality Level-1 products suitable for pixel-level time series analysis. GCPs used for L1TP correction are derived from the Global Land Survey 2000 (GLS2000) data set. • L1GT - Level 1 Systematic Terrain (Corrected) (L1GT) products: L1GT data products consist of L0 product data with systematic radiometric, geometric and terrain corrections applied and resampled for registration to a cartographic projection, referenced to the WGS84, G873, or current version. The dissemination server contains three different classes of Level1 products • Real Time (RT): Newly acquired Landsat 8 OLI/TIRS data are processed upon downlink but use an initial TIRS line-of-sight model parameters; the data is made available in less than 12 hours (4-6 hours typically). Once the data have been reprocessed with the refined TIRS parameters, the products are transitioned to either Tier 1 or Tier 2 and removed from the Real-Time tier (in 14-16 days). • Tier 1 (T1): Landsat scenes with the highest available data quality are placed into Tier 1 and are considered suitable for time-series analysis. Tier 1 includes Level-1 Precision and Terrain (L1TP) corrected data that have well-characterized radiometry and are inter-calibrated across the different Landsat instruments. The georegistration of Tier 1 scenes is consistent and within prescribed image-to-image tolerances of ≦ 12-meter radial root mean square error (RMSE). • Tier 2 (T2): Landsat scenes not meeting Tier 1 criteria during processing are assigned to Tier 2. Tier 2 scenes adhere to the same radiometric standard as Tier 1 scenes, but do not meet the Tier 1 geometry specification due to less accurate orbital information (specific to older Landsat sensors), significant cloud cover, insufficient ground control, or other factors. This includes Systematic Terrain (L1GT) and Systematic (L1GS) processed data. Landsat 8 level 2 products are generated from L1GT and L1TP Level 1 products that meet the <76 degrees Solar Zenith Angle constraint and include the required auxiliary data inputs to generate a scientifically viable product. The data are available a couple of days after the Level1 T1/T2. The level 2 products generated can be L2SP or L2SR: • L2SP - Level 2 Science Products (L2SP) products: include Surface Reflectance (SR), Surface Temperature (ST), ST intermediate bands, an angle coefficients file, and Quality Assessment (QA) Bands. • L2SR - Level 2 Surface Reflectance (L2SR) products: include Surface Reflectance (SR), an angle coefficients file, and Quality Assessment (QA) Bands; it is generated if ST could not be generated Two different categories of Level 1 products are offered: LC with Optical, Thermal and Quality Map images, LO with Optical and Quality Map images (Thermal not available). For the Level 2 data, only LC combined products are generated</summary>
<updated/>
<link length="0.0KB" rel="http://esipfed.org/ns/fedsearch/1.1/search#" hreflang="en-US" href="https://fedeo.ceos.org/opensearch/description.xml?parentIdentifier=Landsat8.Collection2.European.Coverage"/>
<link length="0.0KB" rel="enclosure" hreflang="en-US" href="https://fedeo-client.ceos.org?parentIdentifier=EOP:ESA:EARTH-ONLINE&uid=Landsat8.Collection2.European.Coverage"/>
<link length="0.0KB" rel="enclosure" hreflang="en-US" href="https://fedeo.ceos.org/opensearch/request/?httpAccept=application/vnd.iso.19139-2%2Bxml&parentIdentifier=EOP:ESA:EARTH-ONLINE&uid=Landsat8.Collection2.European.Coverage&recordSchema=iso19139-2"/>
<link href="http://gcmd.nasa.gov/getdif.htm?Landsat8.Collection2.European.Coverage_NA" hreflang="en-US" type="text/html" rel="enclosure" title="Landsat8.Collection2.European.Coverage"/>
<link href="https://fedeo.ceos.org/opensearch/description.xml?parentIdentifier=Landsat8.Collection2.European.Coverage" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Non-CMR OpenSearch Provider Granule Open Search Descriptor Document"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C2241716601-ESA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C2241716601-ESA</dc:identifier>
<dc:date>2015-01-01T00:00:00.000Z/</dc:date>
<echo:datasetId>Landsat 8 Collection 2 European Coverage</echo:datasetId>
<echo:shortName>Landsat8.Collection2.European.Coverage</echo:shortName>
<echo:versionId>NA</echo:versionId>
<echo:entryId>Landsat8.Collection2.European.Coverage_NA</echo:entryId>
<echo:dataCenter>ESA</echo:dataCenter>
<echo:organization>ESA/ESRIN</echo:organization>
<echo:processingLevelId>1</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-35 -20 75 35</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1214584349-SCIOPS</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<title type="text">LANDSAT MSS Data Received at the NASDA Station in Japan</title>
<summary type="text">The LANDSAT Multispectral Scanner (MSS), a mechanical scanning
radiometer, operates in 4 channels of the electro-magnetic spectrum,
from 0.55 to 1.00 micrometers.
Data collected by the Earth Observation Center, NASDA, cover a
circular area about 5000 km diameter. The Earth Observation Center
receives MSS data weekdays and every other Saturday. It performs both
radiometric and geometric correction and distributes products in the
form of magnetic tape and imagery.</summary>
<updated/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT-MSS-NASDA" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT-MSS-NASDA"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1214584349-SCIOPS.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1214584349-SCIOPS</dc:identifier>
<dc:date>1979-01-29T00:00:00.000Z/</dc:date>
<echo:datasetId>LANDSAT MSS Data Received at the NASDA Station in Japan</echo:datasetId>
<echo:shortName>LANDSAT-MSS-NASDA</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>LANDSAT-MSS-NASDA</echo:entryId>
<echo:dataCenter>SCIOPS</echo:dataCenter>
<echo:archiveCenter>JP/RESTEC</echo:archiveCenter>
<echo:organization>JP/RESTEC</echo:organization>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>23 115 55 153</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1214584333-SCIOPS</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<title type="text">LANDSAT Thematic Mapper Data Received at the NASDA Station in Japan</title>
<summary type="text">The LANDSAT Thematic Mapper, a mechanical scanning radiometer, operates in 7
channels of electro-magnetic spectra, including visual, near infrared and
thermal infrared.
Data collected by the Earth Observation Center, NASDA, cover a circular area
about 5000 km diameter. The Earth Observation Center receives TM data weekdays
and every other Saturday. It performs both radiometric and geometric correction
and distributes products in the form of magnetic tape and imagery.</summary>
<updated/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT-TM-NASDA" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT-TM-NASDA"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1214584333-SCIOPS.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1214584333-SCIOPS</dc:identifier>
<dc:date>1984-03-24T00:00:00.000Z/</dc:date>
<echo:datasetId>LANDSAT Thematic Mapper Data Received at the NASDA Station in Japan</echo:datasetId>
<echo:shortName>LANDSAT-TM-NASDA</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>LANDSAT-TM-NASDA</echo:entryId>
<echo:dataCenter>SCIOPS</echo:dataCenter>
<echo:archiveCenter>JP/RESTEC</echo:archiveCenter>
<echo:organization>JP/RESTEC</echo:organization>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>23 115 55 153</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1220567985-USGS_LTA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>CWIC</consortium>
<title type="text">LANDSAT SURFACE REFLECTANCE -L7 ETM+</title>
<summary type="text">Landsat satellite data have been produced, archived, and distributed by the U.S. Geological Survey (USGS) since 1972. Users rely on these data for historical study of land surface change but shoulder the burden of post-production processing to create applications-ready data sets.</summary>
<updated/>
<link rel="enclosure" hreflang="en-US" href="http://earthexplorer.usgs.gov"/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT_SURFACE_REFLECTANCE_L7_ETM" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT_SURFACE_REFLECTANCE_L7_ETM"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1220567985-USGS_LTA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1220567985-USGS_LTA</dc:identifier>
<dc:date>2013-02-13T00:00:00.000Z/</dc:date>
<echo:datasetId>LANDSAT SURFACE REFLECTANCE -L7 ETM+</echo:datasetId>
<echo:shortName>LANDSAT_SURFACE_REFLECTANCE_L7_ETM</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>LANDSAT_SURFACE_REFLECTANCE_L7_ETM</echo:entryId>
<echo:dataCenter>USGS_LTA</echo:dataCenter>
<echo:archiveCenter>DOI/USGS/EROS</echo:archiveCenter>
<echo:organization>DOI/USGS/EROS</echo:organization>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-90 -180 90 180</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
<echo:tag>
<echo:tagKey>org.geoss.geoss_data-core</echo:tagKey>
</echo:tag>
<echo:tag>
<echo:tagKey>gov.nasa.eosdis</echo:tagKey>
</echo:tag>
<echo:is_geoss>true</echo:is_geoss>
<echo:is_eosdis>true</echo:is_eosdis>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1220567969-USGS_LTA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>CWIC</consortium>
<title type="text">Landsat Surface Reflectance - L8 OLI/TIRS</title>
<summary type="text">Landsat satellite data have been produced, archived, and distributed by the U.S. Geological Survey (USGS) since 1972. Users rely on these data for historical study of land surface change but shoulder the burden of post-production processing to create applications-ready data sets.</summary>
<updated/>
<link rel="enclosure" hreflang="en-US" href="http://earthexplorer.usgs.gov"/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT_SURFACE_REFLECTANCE_L8_OLI_TIRS" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT_SURFACE_REFLECTANCE_L8_OLI_TIRS"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1220567969-USGS_LTA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1220567969-USGS_LTA</dc:identifier>
<dc:date>2013-02-01T00:00:00.000Z/</dc:date>
<echo:datasetId>Landsat Surface Reflectance - L8 OLI/TIRS</echo:datasetId>
<echo:shortName>LANDSAT_SURFACE_REFLECTANCE_L8_OLI_TIRS</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>LANDSAT_SURFACE_REFLECTANCE_L8_OLI_TIRS</echo:entryId>
<echo:dataCenter>USGS_LTA</echo:dataCenter>
<echo:archiveCenter>DOI/USGS/EROS</echo:archiveCenter>
<echo:organization>DOI/USGS/EROS</echo:organization>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-90 -180 90 180</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
<echo:tag>
<echo:tagKey>org.geoss.geoss_data-core</echo:tagKey>
</echo:tag>
<echo:tag>
<echo:tagKey>gov.nasa.eosdis</echo:tagKey>
</echo:tag>
<echo:is_geoss>true</echo:is_geoss>
<echo:is_eosdis>true</echo:is_eosdis>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1235542031-USGS_LTA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>CWIC</consortium>
<title type="text">Landsat 8</title>
<summary type="text">The Operational Land Imager (OLI) and Thermal Infrared Sensor (TIRS) are onboard the Landsat 8 satellite, have acquired images of the Earth since February 2013. The sensors collect images of the Earth with a 16-day repeat cycle, referenced to the Worldwide Reference System-2. The approximate scene size is 170 km north-south by 183 km east-west (106 mi by 114 mi).
Landsat 8 image data files consist of 11 spectral bands with a spatial resolution of 30 meters for bands 1-7 and bands 9-11; 15-meters for the panchromatic band 8. Delivered Landsat 8 Level-1 data typically include both OLI and TIRS data files; however, there may be OLI-only and/or TIRS-only scenes in the USGS archive. A Quality Assurance (QA.tif) band is also included. This file provides bit information regarding conditions that may affect the accuracy and usability of a given pixel – clouds, water or snow, for example.</summary>
<updated/>
<link rel="enclosure" hreflang="en-US" href="http://glovis.usgs.gov"/>
<link rel="enclosure" hreflang="en-US" href="http://earthexplorer.usgs.gov"/>
<link rel="describedBy" hreflang="en-US" href="http://landsat.usgs.gov/landsat8.php"/>
<link length="0.0KB" rel="http://esipfed.org/ns/fedsearch/1.1/search#" hreflang="en-US" href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C1235542031-USGS_LTA"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C1235542031-USGS_LTA" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Non-CMR OpenSearch Provider Granule Open Search Descriptor Document"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1235542031-USGS_LTA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1235542031-USGS_LTA</dc:identifier>
<dc:date>2013-02-11T00:00:00.000Z/</dc:date>
<echo:datasetId>Landsat 8</echo:datasetId>
<echo:shortName>Landsat_8</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>Landsat_8</echo:entryId>
<echo:dataCenter>USGS_LTA</echo:dataCenter>
<echo:archiveCenter>DOI/USGS/EROS</echo:archiveCenter>
<echo:organization>DOI/USGS/EROS</echo:organization>
<echo:processingLevelId>Not Provided</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-82.71 -180 82.74 180</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
<echo:tag>
<echo:tagKey>org.ceos.wgiss.cwic.granules.prod</echo:tagKey>
<echo:data>" "</echo:data>
</echo:tag>
<echo:tag>
<echo:tagKey>org.ceos.wgiss.cwic.granules.provider</echo:tagKey>
<echo:data>"USGSLSI"</echo:data>
</echo:tag>
<echo:tag>
<echo:tagKey>org.geoss.geoss_data-core</echo:tagKey>
</echo:tag>
<echo:tag>
<echo:tagKey>gov.nasa.eosdis</echo:tagKey>
</echo:tag>
<echo:is_geoss>true</echo:is_geoss>
<echo:is_eosdis>true</echo:is_eosdis>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C3108204618-INPE</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<title type="text">Landsat Collection 2 - Level-2</title>
<summary type="text">Landsat Collection 2 Level-2 Science Products (https://www.usgs.gov/landsat-missions/landsat-collection-2-level-2-science-products), consisting of atmospherically corrected surface reflectance (https://www.usgs.gov/landsat-missions/landsat-collection-2-surface-reflectance) and surface temperature (https://www.usgs.gov/landsat-missions/landsat-collection-2-surface-temperature) image data. Collection 2 Level-2 Science Products are available from August 22, 1982 to present. This dataset represents the Brazilian archive of Level-2 data from Landsat Collection 2 (https://www.usgs.gov/core-science-systems/nli/landsat/landsat-collection-2) acquired by the Thematic Mapper (https://landsat.gsfc.nasa.gov/thematic-mapper/) onboard Landsat 4 and 5, the Enhanced Thematic Mapper (https://landsat.gsfc.nasa.gov/the-enhanced-thematic-mapper-plus-etm/) onboard Landsat 7, and Operatational Land Imager (https://landsat.gsfc.nasa.gov/satellites/landsat-8/spacecraft-instruments/operational-land-imager/) and Thermal Infrared Sensor (https://landsat.gsfc.nasa.gov/satellites/landsat-8/spacecraft-instruments/thermal-infrared-sensor/) onboard Landsat 8 and 9. Images are stored in cloud-optimized GeoTIFF (https://www.cogeo.org/) format.</summary>
<updated/>
<link length="0KB" rel="enclosure" hreflang="en-US" href="https://fedeo-client.ceos.org?uid=landsat-2"/>
<link length="0KB" rel="enclosure" hreflang="en-US" href="https://fedeo.ceos.org/collections/series/items/landsat-2?httpAccept=application/vnd.iso.19139-2%2Bxml"/>
<link length="0KB" rel="http://esipfed.org/ns/fedsearch/1.1/search#" hreflang="en-US" href="https://fedeo.ceos.org/collections/series/items/landsat-2/api"/>
<link length="0KB" rel="via" hreflang="en-US" href="https://data.inpe.br/bdc/stac/v1/collections/landsat-2/items"/>
<link href="https://fedeo.ceos.org/collections/series/items/landsat-2/api" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Non-CMR OpenSearch Provider Granule Open Search Descriptor Document"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C3108204618-INPE.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C3108204618-INPE</dc:identifier>
<dc:date>2008-01-01T00:00:00.000Z/2024-06-14T00:00:00.000Z</dc:date>
<echo:datasetId>Landsat Collection 2 - Level-2</echo:datasetId>
<echo:shortName>landsat-2</echo:shortName>
<echo:versionId>NA</echo:versionId>
<echo:entryId>landsat-2_NA</echo:entryId>
<echo:dataCenter>INPE</echo:dataCenter>
<echo:organization>DOI/USGS</echo:organization>
<echo:organization>BR/INPE</echo:organization>
<echo:processingLevelId>NA</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-35.6706264 -75.6664631 6.8339121 -27.6837564</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C3108204500-INPE</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<title type="text">Landsat Collection 2 - Level-2 - Data Cube - LCF 16 days</title>
<summary type="text">Earth Observation Data Cube generated from Landsat Level-2 product over Brazil extension. This dataset is provided in Cloud Optimized GeoTIFF (COG) file format. The dataset is processed with 30 meters of spatial resolution, reprojected and cropped to BDC_MD grid Version 2 (BDC_MD V2), considering a temporal compositing function of 16 days using the Least Cloud Cover First (LCF) best pixel approach.</summary>
<updated/>
<link length="0KB" rel="enclosure" hreflang="en-US" href="https://fedeo-client.ceos.org?uid=LANDSAT-16D-1"/>
<link length="0KB" rel="enclosure" hreflang="en-US" href="https://fedeo.ceos.org/collections/series/items/LANDSAT-16D-1?httpAccept=application/vnd.iso.19139-2%2Bxml"/>
<link length="0KB" rel="http://esipfed.org/ns/fedsearch/1.1/search#" hreflang="en-US" href="https://fedeo.ceos.org/collections/series/items/LANDSAT-16D-1/api"/>
<link length="0KB" rel="via" hreflang="en-US" href="https://data.inpe.br/bdc/stac/v1/collections/LANDSAT-16D-1/items"/>
<link href="https://fedeo.ceos.org/collections/series/items/LANDSAT-16D-1/api" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Non-CMR OpenSearch Provider Granule Open Search Descriptor Document"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C3108204500-INPE.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C3108204500-INPE</dc:identifier>
<dc:date>2015-01-01T00:00:00.000Z/2023-12-31T00:00:00.000Z</dc:date>
<echo:datasetId>Landsat Collection 2 - Level-2 - Data Cube - LCF 16 days</echo:datasetId>
<echo:shortName>LANDSAT-16D-1</echo:shortName>
<echo:versionId>NA</echo:versionId>
<echo:entryId>LANDSAT-16D-1_NA</echo:entryId>
<echo:dataCenter>INPE</echo:dataCenter>
<echo:organization>BR/INPE</echo:organization>
<echo:processingLevelId>NA</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-34.6755646 -75.9138367 5.9260044 -33.3435683</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
</entry>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C1220567986-USGS_LTA</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>CEOS</consortium>
<consortium>CWIC</consortium>
<title type="text">LANDSAT SURFACE REFLECTANCE L4-5 TM</title>
<summary type="text">Landsat satellite data have been produced, archived, and distributed by the U.S. Geological Survey (USGS) since 1972. Users rely on these data for historical study of land surface change but shoulder the burden of post-production processing to create applications-ready data sets.</summary>
<updated/>
<link rel="enclosure" hreflang="en-US" href="http://earthexplorer.usgs.gov"/>
<link href="http://gcmd.nasa.gov/getdif.htm?LANDSAT_SURFACE_REFLECTANCE_L4-5_TM" hreflang="en-US" type="text/html" rel="enclosure" title="LANDSAT_SURFACE_REFLECTANCE_L4-5_TM"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C1220567986-USGS_LTA.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C1220567986-USGS_LTA</dc:identifier>
<dc:date>1982-07-01T00:00:00.000Z/2013-01-01T23:59:59.999Z</dc:date>
<echo:datasetId>LANDSAT SURFACE REFLECTANCE L4-5 TM</echo:datasetId>
<echo:shortName>LANDSAT_SURFACE_REFLECTANCE_L4-5_TM</echo:shortName>
<echo:versionId>Not provided</echo:versionId>
<echo:entryId>LANDSAT_SURFACE_REFLECTANCE_L4-5_TM</echo:entryId>
<echo:dataCenter>USGS_LTA</echo:dataCenter>
<echo:archiveCenter>DOI/USGS/EROS</echo:archiveCenter>
<echo:organization>DOI/USGS/EROS</echo:organization>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters/>
<georss:box>-90 -180 90 180</georss:box>
<echo:hasVariables>false</echo:hasVariables>
<echo:hasFormats>false</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>false</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>false</echo:hasTemporalSubsetting>
<echo:cloudHosted>false</echo:cloudHosted>
<relevance:score>2.8028</relevance:score>
<echo:tag>
<echo:tagKey>org.geoss.geoss_data-core</echo:tagKey>
</echo:tag>
<echo:tag>
<echo:tagKey>gov.nasa.eosdis</echo:tagKey>
</echo:tag>
<echo:is_geoss>true</echo:is_geoss>
<echo:is_eosdis>true</echo:is_eosdis>
</entry>
</feed>
Step 3
With the IDN OpenSearch response, obtain the CWIC or FedEO OSDD endpoint according to CEOS-BP-001 for the collection by parsing the href attribute in
<link rel="search" type=”application/opensearchdescription+xml” >(CEOS-BP-001).
# IDN_COLLECTION = 'C1235542031-USGS_LTA' # example from original CDA OpenSearch Client Guide - https://search.earthdata.nasa.gov/search?portal=idn&q=C1235542031-USGS_LTA (does not work).
IDN_COLLECTION = "C2237824918-ORNL_CLOUD"
# IDN_COLLECTION = "C1532648157-ESA"
request_url = get_api_request(collection_template, {'geo:uid': IDN_COLLECTION} )
request_url
'https://cmr.earthdata.nasa.gov/opensearch/collections.atom?&uid=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc'
response = requests.get( request_url )
root = ElementTree.fromstring(response.text)
# Extract <entry> element
el = root.find('{http://www.w3.org/2005/Atom}entry')
xmltxt = ElementTree.tostring(el, encoding='unicode', method='xml')
md("```xml\n" + xmltxt + "\n```\n")
<ns0:entry xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ns0="http://www.w3.org/2005/Atom" xmlns:ns2="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:ns3="http://www.georss.org/georss">
<ns0:id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C2237824918-ORNL_CLOUD</ns0:id>
<ns0:author>
<ns0:name>CMR</ns0:name>
<ns0:email>echodev@echo.nasa.gov</ns0:email>
</ns0:author>
<ns0:consortium>GEOSS</ns0:consortium>
<ns0:consortium>EOSDIS</ns0:consortium>
<ns0:title type="text">GEDI L4A Footprint Level Aboveground Biomass Density, Version 2.1</ns0:title>
<ns0:summary type="text">This dataset contains Global Ecosystem Dynamics Investigation (GEDI) Level 4A (L4A) Version 2 predictions of the aboveground biomass density (AGBD; in Mg/ha) and estimates of the prediction standard error within each sampled geolocated laser footprint. In this version, the granules are in sub-orbits. The algorithm setting group selection used for GEDI02_A Version 2 has been modified for Evergreen Broadleaf Trees in South America to reduce false positive errors resulting from the selection of waveform modes above ground elevation as the lowest mode. The footprints are located within the global latitude band observed by the International Space Station (ISS), nominally 51.6 degrees N and S and reported for the period 2019-04-18 to 2023-03-16. The GEDI instrument consists of three lasers producing a total of eight beam ground transects, which instantaneously sample eight ~25 m footprints spaced approximately every 60 m along-track. The GEDI beam transects are spaced approximately 600 m apart on the Earth's surface in the cross-track direction, for an across-track width of ~4.2 km. Footprint AGBD was derived from parametric models that relate simulated GEDI Level 2A (L2A) waveform relative height (RH) metrics to field plot estimates of AGBD. Height metrics from simulated waveforms associated with field estimates of AGBD from multiple regions and plant functional types (PFTs) were compiled to generate a calibration dataset for models representing the combinations of world regions and PFTs (i.e., deciduous broadleaf trees, evergreen broadleaf trees, evergreen needleleaf trees, deciduous needleleaf trees, and the combination of grasslands, shrubs, and woodlands). For each of the eight beams, additional data are reported with the AGBD estimates, including the associated uncertainty metrics, quality flags, model inputs, and other information about the GEDI L2A waveform for this selected algorithm setting group. Model inputs include the scaled and transformed GEDI L2A RH metrics, footprint geolocation variables and land cover input data including PFTs and the world region identifiers. Additional model outputs include the AGBD predictions for each of the six GEDI L2A algorithm setting groups with AGBD in natural and transformed units and associated prediction uncertainty for each GEDI L2A algorithm setting group. Providing these ancillary data products will allow users to evaluate and select alternative algorithm setting groups. Also provided are outputs of parameters and variables from the L4A models used to generate AGBD predictions that are required as input to the GEDI04_B algorithm to generate 1-km gridded products.</ns0:summary>
<ns0:updated>2023-11-06T16:53:03.000Z</ns0:updated>
<ns0:link rel="enclosure" hreflang="en-US" href="https://daac.ornl.gov/daacdata/gedi/GEDI_L4A_AGB_Density_V2_1/" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://daac.ornl.gov/GEDI/guides/GEDI_L4A_AGB_Density_V2_1.html" type="text/html" />
<ns0:link rel="via" hreflang="en-US" href="https://doi.org/10.3334/ORNLDAAC/2056" />
<ns0:link rel="http://esipfed.org/ns/fedsearch/1.1/service#" hreflang="en-US" href="https://opendap.earthdata.nasa.gov/" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/GEDI_ATBD_L4A_v1.0.pdf" type="application/pdf" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/GEDI_L4A_AGB_Density_V2_1.pdf" type="application/pdf" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/GEDI_L4A_V2_Common_Queries.pdf" type="application/pdf" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/GEDI_L4A_V2_Product_Data_Dictionary.pdf" type="application/pdf" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_deleted_files_mw_163_182.txt" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_deleted_files_orbits_17591_09899.txt" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_revised_files_mw_163_182.txt" />
<ns0:link rel="describedBy" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_revised_files_orbits_17591_09899.txt" />
<ns0:link rel="icon" hreflang="en-US" href="https://daac.ornl.gov/GEDI/guides/GEDI_L4A_AGB_Density_V2_1_Fig1.png" type="image/png" />
<ns0:link rel="via" hreflang="en-US" href="https://gedi.umd.edu" />
<ns0:link href="https://cmr.earthdata.nasa.gov/opensearch/granules.atom?clientId=ceosOpenSearchDoc&shortName=GEDI_L4A_AGB_Density_V2_1_2056&versionId=2.1&dataCenter=ORNL_CLOUD" hreflang="en-US" type="application/atom+xml" rel="search" title="Search for granules" />
<ns0:link href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Granule OpenSearch Descriptor Document" />
<ns0:link href="https://cmr.earthdata.nasa.gov/search/concepts/C2237824918-ORNL_CLOUD.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata" />
<dc:identifier>C2237824918-ORNL_CLOUD</dc:identifier>
<dc:date>2019-04-17T23:00:00.000Z/2023-03-16T21:33:25.000Z</dc:date>
<ns2:datasetId>GEDI L4A Footprint Level Aboveground Biomass Density, Version 2.1</ns2:datasetId>
<ns2:shortName>GEDI_L4A_AGB_Density_V2_1_2056</ns2:shortName>
<ns2:versionId>2.1</ns2:versionId>
<ns2:entryId>GEDI_L4A_AGB_Density_V2_1_2056_2.1</ns2:entryId>
<ns2:dataCenter>ORNL_CLOUD</ns2:dataCenter>
<ns2:archiveCenter>ORNL_DAAC</ns2:archiveCenter>
<ns2:organization>ORNL_DAAC</ns2:organization>
<ns2:processingLevelId>4</ns2:processingLevelId>
<ns2:coordinateSystem>CARTESIAN</ns2:coordinateSystem>
<ns2:orbitParameters />
<ns3:box>-53 -180 54 180</ns3:box>
<ns2:hasVariables>true</ns2:hasVariables>
<ns2:hasFormats>true</ns2:hasFormats>
<ns2:hasTransforms>false</ns2:hasTransforms>
<ns2:hasCombine>false</ns2:hasCombine>
<ns2:hasSpatialSubsetting>true</ns2:hasSpatialSubsetting>
<ns2:hasTemporalSubsetting>true</ns2:hasTemporalSubsetting>
<ns2:cloudHosted>true</ns2:cloudHosted>
<ns2:tag>
<ns2:tagKey>gov.nasa.eosdis</ns2:tagKey>
</ns2:tag>
<ns2:is_eosdis>true</ns2:is_eosdis>
</ns0:entry>
Obtain the OSDD endpoint for the granule search for this collection by parsing the href attribute in <link rel="search" type="application/opensearchdescription+xml" >
root = ElementTree.fromstring(response.text)
# Extract <link> element with the OSDD for the granule search
el = root.find('{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}link[@rel="search"][@type="application/opensearchdescription+xml"]')
xmltxt = ElementTree.tostring(el, encoding='unicode', method='xml')
md("```xml\n" + xmltxt + "\n```\n")
<ns0:link xmlns:ns0="http://www.w3.org/2005/Atom" href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Granule OpenSearch Descriptor Document" />
# work-around
# Extract the short name for future use. Should not be needed according to CEOS OpenSearch Best Practices.
el = root.find('{http://www.w3.org/2005/Atom}entry/{https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom}shortName')
el.text
short_name = el.text
Step 4
Based on the retrieved OSDD, formulate an OpenSearch request for granules belonging to that collection, directed to the relevant server.
el = root.find('{http://www.w3.org/2005/Atom}entry/{http://www.w3.org/2005/Atom}link[@rel="search"][@type="application/opensearchdescription+xml"]')
url_osdd = el.attrib['href']
el.attrib['href']
'https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc'
# Get the OSDD document
response = requests.get( el.attrib['href'] )
xmlstr = minidom.parseString(response.text).toprettyxml(indent=' ',newl='')
md("```xml\n" + xmlstr + "\n```\n")
<?xml version="1.0" ?><feed xmlns="http://a9.com/-/spec/opensearch/1.1/" xmlns:geo="http://a9.com/-/opensearch/extensions/geo/1.0/" xmlns:params="http://a9.com/-/spec/opensearch/extensions/paramseters/1.0/" xmlns:time="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:eop="http://a9.com/-/opensearch/extensions/eo/1.0/">
<title>OpenSearch Exception</title>
<subtitle type="text">No provider present within the `org.ceos.wgiss.cwic.granules.provider` tag.</subtitle>
<updated>2024-12-06T16:28:22Z</updated>
<id>https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc</id>
<link title="self" rel="self" type="application/atom+xml" href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2237824918-ORNL_CLOUD&clientId=ceosOpenSearchDoc"/>
<totalResults>0</totalResults>
</feed>
Step 5 - work around (to correct OSDD URL for non-FedEO collections in IDN)
The OSDD URL currently returned by IDN/CMR is incorrect as reported Tuesday, April 2, 2024 at 9:58 AM. The URL retrieved from the collection search response cannot be used. Another one using the short_name has to be constructed.
Warning
The URL included in the response in case of non-FedEO collections returned by IDN is not correct and should use the short_name. The following code is a “patch” for this issue.
root = ElementTree.fromstring(response.text)
try:
el = root.find('{http://a9.com/-/spec/opensearch/1.1/}title')
print(el.text)
if (el.text == 'OpenSearch Exception'):
url_osdd = "https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?shortName=" + short_name
print("Corrected OSDD URL: " + url_osdd)
except:
pass
OpenSearch Exception
Corrected OSDD URL: https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?shortName=GEDI_L4A_AGB_Density_V2_1_2056
# could not extract this from Atom response due to incorrect link. Set the expected link
# The correct way to get the OSDD seems using the shortName, not collectionConceptId
# url_osdd = "https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?shortName=Landsat_8" # Example 1
# url_osdd = "https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?shortName=GEDI_L4A_AGB_Density_V2_1_2056" # Example 2
url_osdd
'https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?shortName=GEDI_L4A_AGB_Density_V2_1_2056'
# Get the OSDD document for granule search
response = requests.get( url_osdd )
xmlstr = minidom.parseString(response.text).toprettyxml(indent=' ',newl='')
md("```xml\n" + xmlstr + "\n```\n")
<?xml version="1.0" ?><os:OpenSearchDescription xmlns:os="http://a9.com/-/spec/opensearch/1.1/" xmlns:echo="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:geo="http://a9.com/-/opensearch/extensions/geo/1.0/" xmlns:time="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:params="http://a9.com/-/spec/opensearch/extensions/parameters/1.0/" xmlns:referrer="http://www.opensearch.org/Specifications/OpenSearch/Extensions/Referrer/1.0" xmlns:eo="http://a9.com/-/opensearch/extensions/eo/1.0/" xmlns:atom="http://www.w3.org/2005/Atom">
<os:ShortName>CMR Granules</os:ShortName>
<os:Description>NASA CMR Granule search using geo, time and parameter extensions</os:Description>
<os:Contact>echodev@echo.nasa.gov</os:Contact>
<os:Url type="application/atom+xml" rel="results" params:method="GET" template="https://cmr.earthdata.nasa.gov/opensearch/granules.atom?datasetId={echo:datasetId?}&shortName=GEDI_L4A_AGB_Density_V2_1_2056&versionId={echo:versionId?}&dataCenter={echo:dataCenter?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&parentIdentifier={eo:parentIdentifier?}">
<params:Parameter name="datasetId" uiDisplay="Collection identifier" value="{echo:datasetId}" title="Inventory associated with a dataset expressed as an ID" minimum="0"/>
<params:Parameter name="boundingBox" uiDisplay="Bounding box" value="{geo:box}" title="Inventory with a spatial extent overlapping this bounding box" minimum="0"/>
<params:Parameter name="lat" uiDisplay="Latitude" value="{geo:lat}" title="Inventory with latitude in decimal degrees, must be used together with lon and radius" minimum="0" minInclusive="-90.0" maxInclusive="90.0"/>
<params:Parameter name="lon" uiDisplay="Longitude" value="{geo:lon}" title="Inventory with longitude in decimal degrees, must be used together with lat and radius" minimum="0" minInclusive="-180.0" maxInclusive="180.0"/>
<params:Parameter name="radius" uiDisplay="Radius" value="{geo:radius}" title="Inventory with the search radius in meters, must be used together with lat and lon" minimum="0" minInclusive="10" maxInclusive="6000000"/>
<params:Parameter name="geometry" uiDisplay="Geometry" value="{geo:geometry}" title="Inventory with a spatial extent overlapping this geometry" minimum="0">
<atom:link rel="profile" href="http://www.opengis.net/wkt/LINESTRING" title="This service accepts WKT LineStrings"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POINT" title="This service accepts WKT Points"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POLYGON" title="This service accepts WKT Polygons"/>
</params:Parameter>
<params:Parameter name="placeName" uiDisplay="Place name" value="{geo:name}" title="Inventory with a spatial location described by this name" minimum="0"/>
<params:Parameter name="startTime" uiDisplay="Start time" value="{time:start}" title="Inventory with a temporal extent containing this start time" minimum="0"/>
<params:Parameter name="endTime" uiDisplay="End time" value="{time:end}" title="Inventory with a temporal extent containing this end time" minimum="0"/>
<params:Parameter name="cursor" uiDisplay="Start page" value="{os:startPage}" title="Start page for the search result" minimum="0"/>
<params:Parameter name="numberOfResults" uiDisplay="Number of results" value="{os:count}" title="Maximum number of records in the search result" minimum="0" maxInclusive="2000"/>
<params:Parameter name="offset" uiDisplay="Start index" value="{os:startIndex}" title="0-based offset used to skip the specified number of results in the search result set" minimum="0"/>
<params:Parameter name="uid" uiDisplay="Unique identifier identifier" value="{geo:uid}" title="Inventory associated with this unique ID" minimum="0"/>
<params:Parameter name="parentIdentifier" uiDisplay="CMR Collection concept identifier" value="{eo:parentIdentifier}" title="Inventory associated with a dataset expressed as a CMR concept ID" minimum="0"/>
<params:Parameter name="clientId" uiDisplay="Client identifier" value="{referrer:source}" title="Client identifier to be used for metrics" minimum="0"/>
</os:Url>
<os:Url type="text/html" rel="results" params:method="GET" template="https://cmr.earthdata.nasa.gov/opensearch/granules.html?datasetId={echo:datasetId?}&shortName=GEDI_L4A_AGB_Density_V2_1_2056&versionId={echo:versionId?}&dataCenter={echo:dataCenter?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&parentIdentifier={eo:parentIdentifier?}">
<params:Parameter name="datasetId" uiDisplay="Collection identifier" value="{echo:datasetId}" title="Inventory associated with a dataset expressed as an ID" minimum="0"/>
<params:Parameter name="boundingBox" uiDisplay="Bounding box" value="{geo:box}" title="Inventory with a spatial extent overlapping this bounding box" minimum="0"/>
<params:Parameter name="lat" uiDisplay="Latitude" value="{geo:lat}" title="Inventory with latitude in decimal degrees, must be used together with lon and radius" minimum="0" minInclusive="-90.0" maxInclusive="90.0"/>
<params:Parameter name="lon" uiDisplay="Longitude" value="{geo:lon}" title="Inventory with longitude in decimal degrees, must be used together with lat and radius" minimum="0" minInclusive="-180.0" maxInclusive="180.0"/>
<params:Parameter name="radius" uiDisplay="Radius" value="{geo:radius}" title="Inventory with the search radius in meters, must be used together with lat and lon" minimum="0" minInclusive="10" maxInclusive="6000000"/>
<params:Parameter name="geometry" uiDisplay="Geometry" value="{geo:geometry}" title="Inventory with a spatial extent overlapping this geometry" minimum="0">
<atom:link rel="profile" href="http://www.opengis.net/wkt/LINESTRING" title="This service accepts WKT LineStrings"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POINT" title="This service accepts WKT Points"/>
<atom:link rel="profile" href="http://www.opengis.net/wkt/POLYGON" title="This service accepts WKT Polygons"/>
</params:Parameter>
<params:Parameter name="placeName" uiDisplay="Place name" value="{geo:name}" title="Inventory with a spatial location described by this name" minimum="0"/>
<params:Parameter name="startTime" uiDisplay="Start time" value="{time:start}" title="Inventory with a temporal extent containing this start time" minimum="0"/>
<params:Parameter name="endTime" uiDisplay="End time" value="{time:end}" title="Inventory with a temporal extent containing this end time" minimum="0"/>
<params:Parameter name="cursor" uiDisplay="Start page" value="{os:startPage}" title="Start page for the search result" minimum="0"/>
<params:Parameter name="numberOfResults" uiDisplay="Number of results" value="{os:count}" title="Maximum number of records in the search result" minimum="0" maxInclusive="2000"/>
<params:Parameter name="offset" uiDisplay="Start index" value="{os:startIndex}" title="0-based offset used to skip the specified number of results in the search result set" minimum="0"/>
<params:Parameter name="uid" uiDisplay="Unique identifier identifier" value="{geo:uid}" title="Inventory associated with this unique ID" minimum="0"/>
<params:Parameter name="parentIdentifier" uiDisplay="CMR Collection concept identifier" value="{eo:parentIdentifier}" title="Inventory associated with a dataset expressed as a CMR concept ID" minimum="0"/>
<params:Parameter name="clientId" uiDisplay="Client identifier" value="{referrer:source}" title="Client identifier to be used for metrics" minimum="0"/>
</os:Url>
<os:Query role="example" echo:shortName="MOD02QKM" echo:versionId="005" echo:dataCenter="LAADS" geo:box="-180.0,-90.0,180.0,90.0" time:start="2002-05-04T00:00:00Z" time:end="2009-05-04T00:00:00Z" title="Sample search"/>
<os:Attribution>NASA CMR</os:Attribution>
<os:SyndicationRight>open</os:SyndicationRight>
<os:Tags>CMR NASA CWIC CEOS-OS-BP-V1.1/L3 ESIP OGC granule pageOffset=1 indexOffset=0</os:Tags>
</os:OpenSearchDescription>
# Extract URL template for granule search
root = ElementTree.fromstring(response.text)
ns = {'os': 'http://a9.com/-/spec/opensearch/1.1/'}
granule_search_template = root.find('os:Url[@rel="results"][@type="application/atom+xml"]', ns).attrib['template']
# collection_template = collection_url_atom.attrib['template']
granule_search_template
'https://cmr.earthdata.nasa.gov/opensearch/granules.atom?datasetId={echo:datasetId?}&shortName=GEDI_L4A_AGB_Density_V2_1_2056&versionId={echo:versionId?}&dataCenter={echo:dataCenter?}&boundingBox={geo:box?}&lat={geo:lat?}&lon={geo:lon?}&radius={geo:radius?}&geometry={geo:geometry?}&placeName={geo:name?}&startTime={time:start?}&endTime={time:end?}&cursor={os:startPage?}&numberOfResults={os:count?}&offset={os:startIndex?}&uid={geo:uid?}&parentIdentifier={eo:parentIdentifier?}'
request_url = get_api_request(granule_search_template, {'time:start': '1972-09-26T00:00:00Z'} )
request_url
'https://cmr.earthdata.nasa.gov/opensearch/granules.atom?&shortName=GEDI_L4A_AGB_Density_V2_1_2056&startTime=1972-09-26T00:00:00Z'
response = requests.get( request_url )
# xmlstr = minidom.parseString(response.text).toprettyxml(indent=' ', newl='')
# md("```xml\n" + xmlstr + "\n```\n")
root = ElementTree.fromstring(response.text)
# Extract <entry> element
# el = root.find('{http://www.w3.org/2005/Atom}entry')
xmltxt = ElementTree.tostring(root, encoding='unicode', method='xml')
md("```xml\n" + xmltxt + "\n```\n")
<ns0:feed xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ns0="http://www.w3.org/2005/Atom" xmlns:ns1="http://commons.esipfed.org/ns/discovery/1.2/" xmlns:ns2="http://a9.com/-/spec/opensearch/1.1/" xmlns:ns3="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:ns4="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:ns6="http://www.georss.org/georss" ns1:version="1.2">
<ns0:updated>2024-12-06T16:28:23.010Z</ns0:updated>
<ns0:id>https://cmr.earthdata.nasa.gov/opensearch/granules.atom</ns0:id>
<ns0:author>
<ns0:name>CMR</ns0:name>
<ns0:email>echodev@echo.nasa.gov</ns0:email>
</ns0:author>
<ns0:title type="text">ECHO granule metadata</ns0:title>
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<ns0:link rel="http://esipfed.org/ns/fedsearch/1.1/s3#" title="This link provides direct download access via S3 to the granule" hreflang="en-US" href="s3://ornl-cumulus-prod-protected/gedi/GEDI_L4A_AGB_Density_V2_1/data/GEDI04_A_2019108015253_O01960_02_T03910_02_002_02_V002.h5" />
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<ns0:link rel="via" title="Data set Landing Page DOI URL (DATA SET LANDING PAGE)" hreflang="en-US" href="https://doi.org/10.3334/ORNLDAAC/2056" />
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<ns0:link rel="via" title="Data Set Documentation (GENERAL DOCUMENTATION)" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/GEDI_L4A_V2_Common_Queries.pdf" type="application/pdf" />
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<ns0:link rel="via" title="Data Set Documentation (GENERAL DOCUMENTATION)" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_deleted_files_orbits_17591_09899.txt" />
<ns0:link rel="via" title="Data Set Documentation (GENERAL DOCUMENTATION)" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_revised_files_mw_163_182.txt" />
<ns0:link rel="via" title="Data Set Documentation (GENERAL DOCUMENTATION)" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/public/gedi/GEDI_L4A_AGB_Density_V2_1/comp/list_of_revised_files_orbits_17591_09899.txt" />
<ns0:link rel="via" title="api endpoint to retrieve temporary credentials valid for same-region direct s3 access (VIEW RELATED INFORMATION)" hreflang="en-US" href="https://data.ornldaac.earthdata.nasa.gov/s3credentials" />
<ns0:link rel="http://esipfed.org/ns/fedsearch/1.1/service#" title="OPeNDAP request URL (GET DATA : OPENDAP DATA)" hreflang="en-US" href="https://opendap.earthdata.nasa.gov/collections/C2237824918-ORNL_CLOUD/granules/GEDI_L4A_AGB_Density_V2_1.GEDI04_A_2019108015253_O01960_02_T03910_02_002_02_V002.h5" />
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<ns3:inherited />
</ns0:link>
<ns0:link ns3:inherited="true" rel="via" hreflang="en-US" href="https://doi.org/10.3334/ORNLDAAC/2056">
<ns3:inherited />
</ns0:link>
<ns0:link ns3:inherited="true" rel="http://esipfed.org/ns/fedsearch/1.1/service#" hreflang="en-US" href="https://opendap.earthdata.nasa.gov/">
<ns3:inherited />
</ns0:link>
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<ns3:inherited />
</ns0:link>
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<ns3:inherited />
</ns0:link>
<ns0:link ns3:inherited="true" rel="via" hreflang="en-US" href="https://gedi.umd.edu">
<ns3:inherited />
</ns0:link>
<ns0:link href="https://cmr.earthdata.nasa.gov/search/concepts/G2613752613-ORNL_CLOUD.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata" />
<dc:identifier>G2613752613-ORNL_CLOUD</dc:identifier>
<dc:date>2019-04-18T02:15:57.000Z/2019-04-18T02:38:57.000Z</dc:date>
<ns3:datasetId>GEDI L4A Footprint Level Aboveground Biomass Density, Version 2.1</ns3:datasetId>
<ns3:collectionConceptId>C2237824918-ORNL_CLOUD</ns3:collectionConceptId>
<ns3:granuleSizeMB>324.322707</ns3:granuleSizeMB>
<ns3:originalFormat>ECHO10</ns3:originalFormat>
<ns3:dataCenter>ORNL_CLOUD</ns3:dataCenter>
<ns3:coordinateSystem>GEODETIC</ns3:coordinateSystem>
<ns6:polygon>0.579059 60.4911842 3.642535 62.6533508 6.6990881 64.8318405 9.7432947 67.0409622 12.7691469 69.2953491 15.7702131 71.6097717 18.7392311 74.0002365 21.6690865 76.483963 24.5510254 79.0796356 27.376009 81.8069077 30.1319752 84.686348 32.8091354 87.7424774 35.3923035 90.9988632 37.8662415 94.4803543 40.213459 98.2141571 42.4124565 102.2218399 44.4413834 106.5232315 46.2767677 111.1362915 47.8905945 116.0625076 49.2572479 121.2932892 50.3497734 126.8029556 51.1454773 132.5445099 51.6247368 138.4529724 51.7762222 144.4246979 51.8265839 144.4247131 51.6749001 138.4457703 51.1950531 132.5303955 50.3984261 126.7825546 49.3046951 121.2674103 47.9366417 116.0320816 46.3212852 111.102211 44.484314 106.4863358 42.4537964 102.1828766 40.2532463 98.1737137 37.9045448 94.4389267 35.4292183 90.9568329 32.8447685 87.700119 30.1664371 84.6438751 27.4094162 81.7644653 24.5834961 79.0373077 21.7007351 76.441803 18.7701778 73.9582672 15.8005648 71.5680084 12.7990179 69.2537689 9.772789 66.9995422 6.728313 64.7905426 3.6715939 62.612133 0.608061 60.4500084 0.579059 60.4911842</ns6:polygon>
</ns0:entry>
</ns0:feed>
Obtaining the OpenSearch Description Document (OSDD)#
OpenSearch Description Documents (OSDDs) provide necessary information for clients to programmatically formulate valid search requests. Specifically, clients are expected to acquire both the cardinality and the domain of request parameters based on the query template in the OSDD. Collection valids (e.g. spatial bounding coordinates and temporal extent) are also provided in the OSDD in both machine parsable and human readable formats. Collection valids enable clients to formulate valid requests yielding more accurate results.
The federated system provides both generic and collection specific OSDDs. IDN provides the generic OSDD to be used for collection search. Alternatively, clients are also able to fetch a generic OSDD through the CWIC or FedEO OSDD endpoint. The OSDD request should also include a client identifier string, as recommended by the CEOS OpenSearch Best Practices.
Collection-specific OSDD are returned by IDN as part of collection search results. In a collection specific OSDD, the domain is provided for some parameters (e.g., timeStart and timeEnd) in addition to the request parameter syntax.
Generic OSDD request URL example (CMR): https://cmr.earthdata.nasa.gov/opensearch/collections/descriptor_document.xml?clientId=foo
Generic OSDD request URL example (FedEO): https://fedeo.ceos.org/opensearch/description.xml
Search request#
CEOS OpenSearch supports both searching for collections through the IDN and for granules in a specific collection at one of the data partners (i.e. “CWIC” and “FedEO”). It executes a collection or inventory search (a.k.a. granule search), as appropriate, and returns the matching results.
In order to initialize a valid request, clients will fill request parameters with proper values. The
template of the OpenSearch request is available under the <Url> element in the OSDD.
Search response#
OpenSearch does not define or require any specific encoding format for the search response.
Instead, it defines a set of search-related metadata elements which can be inserted into existing encoding formats. Typically, list-based XML syndication formats - such as RSS 2.0 and Atom 1.0 - are used.
The OpenSearch response elements include:
totalResults: number of total resultsstartIndex: index number corresponding to the first entry item returneditemsPerPage: number of results returnedQuery: search query to get the same search response
Below is an example of a search response from the IDN in Atom, to the free keyword search “water”.
request_url = get_api_request(collection_template, {'count': '1', 'searchTerms': 'water', 'startIndex': '1', 'startPage': '1'} )
request_url
'https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&offset=1&clientId=ceosOpenSearchDoc'
response = requests.get( request_url )
xmlstr = minidom.parseString(response.text).toprettyxml(indent=' ', newl='')
md("```xml\n" + xmlstr + "\n```\n")
<?xml version="1.0" ?><feed xmlns:relevance="http://a9.com/-/opensearch/extensions/relevance/1.0/" xmlns:os="http://a9.com/-/spec/opensearch/1.1/" xmlns:georss="http://www.georss.org/georss" xmlns="http://www.w3.org/2005/Atom" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:echo="https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom" xmlns:esipdiscovery="http://commons.esipfed.org/ns/discovery/1.2/" xmlns:gml="http://www.opengis.net/gml" xmlns:time="http://a9.com/-/opensearch/extensions/time/1.0/" xmlns:eo="http://a9.com/-/opensearch/extensions/eo/1.0/" esipdiscovery:version="1.2">
<updated>2024-12-06T16:28:23.379Z</updated>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<title type="text">ECHO dataset metadata</title>
<subtitle type="text">Search parameters: keyword => water</subtitle>
<link href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml" hreflang="en-US" type="application/opensearchdescription+xml" rel="search"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&offset=1&clientId=ceosOpenSearchDoc" hreflang="en-US" type="application/atom+xml" rel="self"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&clientId=ceosOpenSearchDoc&offset=23204" hreflang="en-US" type="application/atom+xml" rel="last"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&clientId=ceosOpenSearchDoc&offset=0" hreflang="en-US" type="application/atom+xml" rel="previous"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&clientId=ceosOpenSearchDoc&offset=2" hreflang="en-US" type="application/atom+xml" rel="next"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/collections.atom?keyword=water&cursor=1&numberOfResults=1&clientId=ceosOpenSearchDoc&offset=0" hreflang="en-US" type="application/atom+xml" rel="first"/>
<link href="https://wiki.earthdata.nasa.gov/display/echo/Open+Search+API+release+information" hreflang="en-US" type="text/html" rel="describedBy" title="Release Notes"/>
<os:Query xmlns:geo="http://a9.com/-/opensearch/extensions/geo/1.0/" role="request" os:searchTerms="water"/>
<os:totalResults>23204</os:totalResults>
<os:itemsPerPage>1</os:itemsPerPage>
<os:startIndex>2</os:startIndex>
<entry>
<id>https://cmr.earthdata.nasa.gov/opensearch/collections.atom?uid=C2799438266-POCLOUD</id>
<author>
<name>CMR</name>
<email>echodev@echo.nasa.gov</email>
</author>
<consortium>GEOSS</consortium>
<consortium>EOSDIS</consortium>
<title type="text">SWOT Level 2 Water Mask Pixel Cloud Data Product, Version C</title>
<summary type="text">Point cloud of water mask pixels (“pixel cloud”) with geolocated heights, backscatter, geophysical fields, and flags. Point cloud over tile (approx 64x64 km2); half swath (left or right side of full swath). Available in netCDF-4 file format.<br>
Please note that this collection contains SWOT Version C science data products.</summary>
<updated>2022-07-20T18:09:33.000Z</updated>
<link rel="describedBy" hreflang="en-US" href="https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/D-109532_SWOT_UserHandbook_20240502.pdf" type="application/pdf"/>
<link rel="via" hreflang="en-US" href="https://swot.jpl.nasa.gov"/>
<link rel="describedBy" hreflang="en-US" href="https://swot.jpl.nasa.gov"/>
<link rel="describedBy" hreflang="en-US" href="https://www.nasa.gov/swot"/>
<link rel="describedBy" hreflang="en-US" href="https://www.jpl.nasa.gov/missions/surface-water-and-ocean-topography-swot"/>
<link rel="describedBy" hreflang="en-US" href="https://podaac.jpl.nasa.gov/swot"/>
<link rel="describedBy" hreflang="en-US" href="https://www.aviso.altimetry.fr/en/missions/current-missions/swot.html" type="text/html"/>
<link rel="via" hreflang="en-US" href="https://github.com/podaac/data-subscriber"/>
<link rel="describedBy" hreflang="en-US" href="https://podaac.jpl.nasa.gov/CitingPODAAC"/>
<link length="0.0MB" rel="enclosure" hreflang="en-US" href="https://cmr.earthdata.nasa.gov/virtual-directory/collections/C2799438266-POCLOUD"/>
<link length="0.0MB" rel="enclosure" hreflang="en-US" href="https://search.earthdata.nasa.gov/search/granules?p=C2799438266-POCLOUD"/>
<link rel="icon" hreflang="en-US" href="https://podaac.jpl.nasa.gov/Podaac/thumbnails/SWOT_L2_HR_PIXC_2.0.jpg" type="image/jpeg"/>
<link rel="describedBy" hreflang="en-US" href="https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/pdd/D-56411_SWOT_Product_Description_L2_HR_PIXC_20240913.pdf" type="application/pdf"/>
<link rel="describedBy" hreflang="en-US" href="https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/atbd/D-105504_SWOT_ATBD_L2_HR_PIXC_20230713a_cite2.pdf" type="application/pdf"/>
<link rel="enclosure" hreflang="en-US" href="https://search.earthdata.nasa.gov/search/granules?p=C2799438266-POCLOUD&pg[0][id]=*_PIC*"/>
<link rel="enclosure" hreflang="en-US" href="https://search.earthdata.nasa.gov/search/granules?p=C2799438266-POCLOUD&pg[0][id]=*PGC0*"/>
<link rel="describedBy" hreflang="en-US" href="https://archive.podaac.earthdata.nasa.gov/podaac-ops-cumulus-docs/web-misc/swot_mission_docs/releases/SWOT_VersionC_KaRIn_Products_Release_Note_20241014.pdf" type="application/pdf"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/granules.atom?clientId=ceosOpenSearchDoc&shortName=SWOT_L2_HR_PIXC_2.0&versionId=2.0&dataCenter=POCLOUD" hreflang="en-US" type="application/atom+xml" rel="search" title="Search for granules"/>
<link href="https://cmr.earthdata.nasa.gov/opensearch/granules/descriptor_document.xml?collectionConceptId=C2799438266-POCLOUD&clientId=ceosOpenSearchDoc" hreflang="en-US" type="application/opensearchdescription+xml" rel="search" title="Granule OpenSearch Descriptor Document"/>
<link href="https://cmr.earthdata.nasa.gov/search/concepts/C2799438266-POCLOUD.xml" hreflang="en-US" type="application/xml" rel="via" title="Product metadata"/>
<dc:identifier>C2799438266-POCLOUD</dc:identifier>
<dc:date>2022-12-16T00:00:00.000Z/</dc:date>
<echo:datasetId>SWOT Level 2 Water Mask Pixel Cloud Data Product, Version C</echo:datasetId>
<echo:shortName>SWOT_L2_HR_PIXC_2.0</echo:shortName>
<echo:versionId>2.0</echo:versionId>
<echo:entryId>SWOT_L2_HR_PIXC_2.0_2.0</echo:entryId>
<echo:dataCenter>POCLOUD</echo:dataCenter>
<echo:archiveCenter>NASA/JPL/PODAAC</echo:archiveCenter>
<echo:organization>NASA/JPL/PODAAC</echo:organization>
<echo:organization>Jet Propulsion Laboratory</echo:organization>
<echo:processingLevelId>2</echo:processingLevelId>
<echo:coordinateSystem>CARTESIAN</echo:coordinateSystem>
<echo:orbitParameters swathWidth="120.0" period="102.89" inclinationAngle="77.6" numberOfOrbits="0.5"/>
<georss:box>-90 -180 90 180</georss:box>
<echo:hasVariables>true</echo:hasVariables>
<echo:hasFormats>true</echo:hasFormats>
<echo:hasTransforms>false</echo:hasTransforms>
<echo:hasCombine>false</echo:hasCombine>
<echo:hasSpatialSubsetting>true</echo:hasSpatialSubsetting>
<echo:hasTemporalSubsetting>true</echo:hasTemporalSubsetting>
<echo:cloudHosted>true</echo:cloudHosted>
<relevance:score>1.43</relevance:score>
<echo:tag>
<echo:tagKey>gov.nasa.eosdis</echo:tagKey>
</echo:tag>
<echo:is_eosdis>true</echo:is_eosdis>
</entry>
</feed>
Notice the OpenSearch elements which appear inside the feed element. Namespaces referred in the OpenSearch response are listed as follows:
xmlns http://www.w3.org/2005/Atom
xmlns:dc http://purl.org/dc/elements/1.1/
xmlns:echo https://cmr.earthdata.nasa.gov/search/site/docs/search/api.html#atom
xmlns:eo http://a9.com/-/opensearch/extensions/eo/1.0/
xmlns:esipdiscovery http://commons.esipfed.org/ns/discovery/1.2/
xmlns:georss http://www.georss.org/georss
xmlns:gml http://www.opengis.net/gml
xmlns:os http://a9.com/-/spec/opensearch/1.1/
xmlns:relevance http://a9.com/-/opensearch/extensions/relevance/1.0/
xmlns:time http://a9.com/-/opensearch/extensions/time/1.0/
Atom
| Element | Value |
|---|---|
| atom: title | Atom feed title element |
| atom: updated | Date tag indicating when granule metadata is returned from data provider |
| atom: author | Fixed value, which is the contact information of supporting team |
| atom: id | Fixed value for search identifier |
| opensearch: totalResults | Number of records matched |
| opensearch: startIndex | Number of start record desired by client |
| opensearch: itemsPerPage | Actual number of returned items per page |
| opensearch: Query | Query element recording actual request parameter values from client |
| atom: link | Traversal link. Supported ‘rel’ attribute values include:
|
Atom
| Element | Value |
|---|---|
| atom:title | Descriptive title for the entry |
| atom:id | Unique identifier of the entry within the local catalog system |
| atom: updated | Date tag indicating when entry metadata is last updated by data provider |
| atom:author | Fixed value, which is the contact information of data provider |
| spatial extent elements | For each granule, at least one <georss:box> will be provided to represent the minimum bounding rectangle of spatial extent of entry, if applicable. <georss:box> is formatted with coordinate order of WestBoundingLongitude, SouthBoundingLatitude, EastBoundingLongitude, NorthBoundingLatitude. All coordinates are in EPSG:4326 <georss:polygon> and other geometries may also be provided if it is available in data provider’s metadata. |
| temporal element | For each entry, a single |
| atom:link | Supported values under ‘rel’ attribute: via/enclosure/alternate/icon (See Table below) |
| atom:summary | Summary descriptive text for the entry |
‘rel’ attributes of Atom element
| ‘rel’ attribute | Artifact |
|---|---|
| via | Metadata |
| icon | Browse |
| alternate | Documentation |
| describedby | Documentation |
| enclure | Product |
| up | Collection Metadata |
Error Handling#
The CEOS OpenSearch Best Practices (CEOS-BP-017) recommends the use of HTTP status codes as following, 4xx for client errors, and 5xx for server errors.
400 Bad Request: The request has an invalid syntax (i.e. badly formatted geometry)
413 Request Entity Too Large: The request originates too many returnable hits
415 Unsupported media type: Media type in the request is not available or valid.
500 Internal Server Error: Default code for the server side for an execution error.
501 Not Implemented: When requesting an unimplemented feature (e.g. relation operator not supported).
503 Service Unavailable: When the search service is temporarily not available (due to overload or other reasons).
504 Gateway Timeout: When the search engine is a broker or aggregator to other services that fail to produce an answer within a giving time frame.
CEOS OpenSearch implementations are recommended to support these codes.