Unify Earth Observation products access with OpenSearch

CEOS WGISS 35 - Sao Jose dos Campos, Brazil - 2013.05.08

OpenSearch applied to Earth Observations products

Keywords: opensearch, EO, RDF, Linked Data

Transcript

1. Jérôme Gasperi Unify Earth Observation products access with OpenSearch CEOS WGISS-35 INPE - Sao Paulo dos Campos, Brazil - May 8th, 2013
2. What is Opensearch ? http://www.opensearch.org
3. OpenSearch is a collection of simple formats for the sharing of search results.
4. The OpenSearch description document format can be used to describe a search engine so that it can be used by search client applications
5. Search results can be returned as HTML, Atom, RDF, KML, json, etc.
6. OpenSearch description document http://www.opensearch.org/Specifications/OpenSearch/1.1/Draft_5#OpenSearch_description_document
7. The OpenSearch description document provides a set of URL templates which describe the query parameters accepted by the service and the variety of output formats in which results can be obtained
8. <?xml version="1.0" encoding="UTF-8"?> <OpenSearchDescription xmlns="http://a9.com/-/spec/OpenSearch/1.1/"> <ShortName>Search service</ShortName> <Description>My dummy search service</Description> <Tags>example search opensearch</Tags> <Contact>admin@example.com</Contact> <Url type="application/atom+xml” template="http://example.com/?q={searchTerms}&amp;pw={startPage?} &amp;format=atom"/> <Url type="text/html” template="http://example.com/?q={searchTerms}&amp;pw={startPage?}&amp;format=html"/> </OpenSearchDescription>
9. <?xml version="1.0" encoding="UTF-8"?> <OpenSearchDescription xmlns="http://a9.com/-/spec/OpenSearch/1.1/"> <ShortName>Search service</ShortName> <Description>My dummy search service</Description> <Tags>example search opensearch</Tags> <Contact>admin@example.com</Contact> <Url type="application/atom+xml” template="http://example.com/?q={searchTerms}&amp;pw={startPage?} &amp;format=atom"/> <Url type="text/html” template="http://example.com/?q={searchTerms}&amp;pw={startPage?}&amp;format=html"/> </OpenSearchDescription> Output format is HTML Query parameters Output format is ATOM
10. Two main extensions - Time and Geospatial time:start time:end geo:box geo:geometry geo:relation geo:name geo:lat, geo:lon, geo:radius
11. Real life Opensearch benefits The GEO Geohazards Supersite example
12. Search query are concises HTTP GET requests #1
13. Get products available here
15. <csw:GetRecords xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" outputSchema="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" version="2.0.2" service="CSW" resultType="results" startPosition="1" maxRecords="20"> <csw:Query typeNames="rim:RegistryPackage rim:ExtrinsicObject"> <csw:ElementSetName typeNames="rim:RegistryPackage">full</csw:ElementSetName> <csw:Constraint version="1.1.0"> <ogc:Filter> <ogc:And> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:RegistryPackage/rim:RegistryObjectList[*]/rim:RegistryObject/@id</ogc:PropertyName> <ogc:PropertyName>/rim:ExtrinsicObject/@id</ogc:PropertyName> </ogc:PropertyIsEqualTo> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:ExtrinsicObject/@objectType</ogc:PropertyName> <ogc:Literal>urn:ogc:def:objectType:OGC-CSW-ebRIM-EO::EOProduct</ogc:Literal> </ogc:PropertyIsEqualTo> <ogc:BBOX> <ogc:PropertyName> /rim:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:slot:OGC-CSW-ebRIM-EO::multiExtentOf"]/wrs:ValueList/wrs:AnyValue[1] </ogc:PropertyName> <Envelope xmlns="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" srsName="EPSG:4326"> <lowerCorner>-23.8 -47.3</lowerCorner> <upperCorner>-23.2 -45.5</upperCorner> </Envelope> </ogc:BBOX> </ogc:And> </ogc:Filter> </csw:Constraint> </csw:Query> </csw:GetRecords> HMA This in an HTTP POST request - i.e. no link possible !
16. <csw:GetRecords xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" outputSchema="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" version="2.0.2" service="CSW" resultType="results" startPosition="1" maxRecords="20"> <csw:Query typeNames="rim:RegistryPackage rim:ExtrinsicObject"> <csw:ElementSetName typeNames="rim:RegistryPackage">full</csw:ElementSetName> <csw:Constraint version="1.1.0"> <ogc:Filter> <ogc:And> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:RegistryPackage/rim:RegistryObjectList[*]/rim:RegistryObject/@id</ogc:PropertyName> <ogc:PropertyName>/rim:ExtrinsicObject/@id</ogc:PropertyName> </ogc:PropertyIsEqualTo> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:ExtrinsicObject/@objectType</ogc:PropertyName> <ogc:Literal>urn:ogc:def:objectType:OGC-CSW-ebRIM-EO::EOProduct</ogc:Literal> </ogc:PropertyIsEqualTo> <ogc:BBOX> <ogc:PropertyName> /rim:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:slot:OGC-CSW-ebRIM-EO::multiExtentOf"]/wrs:ValueList/wrs:AnyValue[1] </ogc:PropertyName> <Envelope xmlns="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" srsName="EPSG:4326"> <lowerCorner>-23.8 -47.3</lowerCorner> <upperCorner>-23.2 -45.5</upperCorner> </Envelope> </ogc:BBOX> </ogc:And> </ogc:Filter> </csw:Constraint> </csw:Query> </csw:GetRecords> HMA This in an HTTP POST request - i.e. no link possible ! <GetRecords xmlns="http://www.opengis.net/cat/csw/2.0.2" xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd" service="CSW" version="2.0.2" resultType="results" outputSchema="http://www.opengis.net/cat/csw/2.0.2" startPosition="1" maxRecords="20"> <Query typeNames="csw:Record"> <ElementSetName typeNames="csw:Record">full</ElementSetName> <Constraint version="1.1.0"> <ogc:Filter> <ogc:And> <ogc:PropertyIsEqualTo> <ogc:PropertyName>dc:subject</ogc:PropertyName> <ogc:Literal>dc8capac</ogc:Literal> </ogc:PropertyIsEqualTo> <ogc:BBOX> <ogc:PropertyName> ows:BoundingBox </ogc:PropertyName> <gml:Envelope srsName="EPSG:4326"> <gml:lowerCorner>-23.8 -47.3</gml:lowerCorner> <gml:upperCorner>-23.2 -45.5</gml:upperCorner> </gml:Envelope> </ogc:BBOX> </ogc:And> </ogc:Filter> </Constraint> </Query> </GetRecords> CWIC This in an HTTP POST request - i.e. no link possible !
17. <csw:GetRecords xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:rim="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" outputSchema="urn:oasis:names:tc:ebxml-regrep:xsd:rim:3.0" version="2.0.2" service="CSW" resultType="results" startPosition="1" maxRecords="20"> <csw:Query typeNames="rim:RegistryPackage rim:ExtrinsicObject"> <csw:ElementSetName typeNames="rim:RegistryPackage">full</csw:ElementSetName> <csw:Constraint version="1.1.0"> <ogc:Filter> <ogc:And> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:RegistryPackage/rim:RegistryObjectList[*]/rim:RegistryObject/@id</ogc:PropertyName> <ogc:PropertyName>/rim:ExtrinsicObject/@id</ogc:PropertyName> </ogc:PropertyIsEqualTo> <ogc:PropertyIsEqualTo> <ogc:PropertyName>/rim:ExtrinsicObject/@objectType</ogc:PropertyName> <ogc:Literal>urn:ogc:def:objectType:OGC-CSW-ebRIM-EO::EOProduct</ogc:Literal> </ogc:PropertyIsEqualTo> <ogc:BBOX> <ogc:PropertyName> /rim:ExtrinsicObject/rim:Slot[@name="urn:ogc:def:slot:OGC-CSW-ebRIM-EO::multiExtentOf"]/wrs:ValueList/wrs:AnyValue[1] </ogc:PropertyName> <Envelope xmlns="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" srsName="EPSG:4326"> <lowerCorner>-23.8 -47.3</lowerCorner> <upperCorner>-23.2 -45.5</upperCorner> </Envelope> </ogc:BBOX> </ogc:And> </ogc:Filter> </csw:Constraint> </csw:Query> </csw:GetRecords> HMA This in an HTTP POST request - i.e. no link possible ! http://eo-virtual-archive4.esa.int/search/ASA_IM__0P/atom/?bbox=25,26,41,41&startIndex=1&count=20 OpenSearch This is an HTTP GET request - i.e. this is a link ! <GetRecords xmlns="http://www.opengis.net/cat/csw/2.0.2" xmlns:csw="http://www.opengis.net/cat/csw/2.0.2" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:ogc="http://www.opengis.net/ogc" xmlns:gml="http://www.opengis.net/gml" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.opengis.net/cat/csw/2.0.2 http://schemas.opengis.net/csw/2.0.2/CSW-discovery.xsd" service="CSW" version="2.0.2" resultType="results" outputSchema="http://www.opengis.net/cat/csw/2.0.2" startPosition="1" maxRecords="20"> <Query typeNames="csw:Record"> <ElementSetName typeNames="csw:Record">full</ElementSetName> <Constraint version="1.1.0"> <ogc:Filter> <ogc:And> <ogc:PropertyIsEqualTo> <ogc:PropertyName>dc:subject</ogc:PropertyName> <ogc:Literal>dc8capac</ogc:Literal> </ogc:PropertyIsEqualTo> <ogc:BBOX> <ogc:PropertyName> ows:BoundingBox </ogc:PropertyName> <gml:Envelope srsName="EPSG:4326"> <gml:lowerCorner>-23.8 -47.3</gml:lowerCorner> <gml:upperCorner>-23.2 -45.5</gml:upperCorner> </gml:Envelope> </ogc:BBOX> </ogc:And> </ogc:Filter> </Constraint> </Query> </GetRecords> CWIC This in an HTTP POST request - i.e. no link possible !
18. HTML results can be indexed by search engine bots #2
19. Natural language search OpenSearch request !
20. ATOM results are easily handled by advanced clients #3
21. OpenSearch request ! Google maps
22. OpenSearch request ! mapshup
23. CNES activities on Opensearch Land Surfaces Thematic center (PTSC)
24. "The objective of the Land Surface Thematic Center is to facilitate the study of issues related to the impact of anthropogenic pressures on climate and ecosystems, quantify and model the water cycle and carbon monitoring developments of societies and their activities, understand the dynamics of biodiversity."
25. To achieve this objective, the center will develop and make available to the scientific community data, products, processes and services related to the observation from space land surfaces.
26. CNES METACATALOG GEOSUD Kalideos Land Surfaces Portal POSTEL Spirit Hydroweb Landsat South France IGN Take5 PTSC by end of 2013 ~1000 products France Very High resolution cover ~ 120 000 products OpenSearch OpenSearch CSW ISO CSW CIM