CEOS WGISS 35 - Sao Jose dos Campos, Brazil - 2013.05.08 OpenSearch applied to Earth Observations products

1. Unify Earth Observation products access
with OpenSearch
Jérôme Gasperi
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. Output format is ATOM
<?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

10. Two main extensions - Time and Geospatial
time:start
geo:lat, geo:lon, geo:radius
time:end
geo:box
geo:geometry
geo:relation
geo:name

11. Real life Opensearch benefits
The GEO Geohazards Supersite example

12. #1
Search query are concises HTTP GET requests

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 !
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 !
http://eo-virtual-archive4.esa.int/search/ASA_IM__0P/atom/?bbox=25,26,41,41&startIndex=1&count=20

18. #2
HTML results can be indexed by search engine bots

19. Natural language search
OpenSearch request !

20. #3
ATOM results are easily handled by advanced clients

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. PTSC by end of 2013
Landsat
South
France Hydroweb
Spirit
h
c
ear
S
pen
O
Land Surfaces
Portal
OpenSearch
POSTEL
~ 120 000 products
CNES
Kalideos Take5
METACATALOG
CS
W
ISO
CSW
CIM
France Very High
resolution cover
IGN
GEOSUD
~1000 products