eo profile of gml and hma product catalogfor vito cvb
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FRASCATI ESRIN 15th of December 2009 Slide 1
EO Profile of GML and HMA Product EO Profile of GML and HMA Product CatalogCatalog for VITO CVBfor VITO CVB
HMA-T Phase 2 FP Meeting15th of December 2009, ESRIN
Steven Smolders, GIM nvTim Jacobs, VITO
Frédéric Houbie, ERDAS
FRASCATI ESRIN 15th of December 2009 Slide 2
OverviewOverview
Achievements• GML Application schema for EO Products• EO EP of ebRIM CSW RI• EO EP of ebRIM CSW with GetRepositoryItem
demonstration• Integration with EO WMS
Open Issues
HMA-T demos
Future work
FRASCATI ESRIN 15th of December 2009
EO GML achievementsEO GML achievements
• Tested the GML 3.1.1 Application schema for EO Products on a wide range of “derived” SPOT VGT Products:
• “Base” Physical Values Product: VGT- P• Synthesis Products: VGT S1, S10, D10• Derived Bio/GeoPhysical Products (produced in
VGT4africa, GMFS, GeoSuccess projects):• Normalised Difference Water Index (NDWI)• Vegetation Productivity Indicator (VPI)• Fractional Cover (fCover)• Leaf Area Index • Albedo• Phenology
• Aerosol Optical Depth (MERIS derived)
Slide 3
FRASCATI ESRIN 15th of December 2009
EO GML achievementsEO GML achievements
• A set of Change Requests (internal to SWG) for the EO GML that are addressed in OGC06-080r5
• cardinality of <eop:ProcessingInformation> or subelementsinconsistency between text and schemas => ProcessingInformation Cardinality changed to 1..n
• cardinality of ProductType - schema implies it is mandatory =>Made optional
• In order to describe synthesis products, more flexibility is to be allowed in the compositeType element: its type will be changed to xs:duration
• Editorial corrections (e.g. EarthObservationEquipement)
Slide 4
FRASCATI ESRIN 15th of December 2009
EO GML achievementsEO GML achievements• For description of VITO “derived” vegetation products a set
of additional metadata elements were described in a separate schema “vdp” for “vegetation derived products”targeted at
Product Discovery => Catalogues
Product exploitation => descriptive file that is shipped
together with the products: important to have
– Lineage information (different processing steps)
– Information for the correct interpretation of the images (flag
values, band ranges, …)
• Convenient to have same metadata model/format for bothSlide 5
FRASCATI ESRIN 15th of December 2009
EO GML achievementsEO GML achievements
• Schema contains mainly exploitation metadata: • Information for the correct interpretation of the
images • Significant digital value (display) ranges
(min/max)• Physical values ranges (min/max)• Scale factor and Offset • Flag values (Label, code and value): e.g. snow,
cloud, missing meteo values, ...• lineage information (different
processing steps)
Slide 6
FRASCATI ESRIN 15th of December 2009 Slide 7
EO EP AchievementsEO EP Achievements
EO EP of ebRIM CSW compliant Catalogue available as Reference Implementation
Containing EO GML EOP Metadata for
– 14 VGT4africa product collections with data covering 01/01/08 to30/06/09
– Metadata examples for VGT-P, S1, S10 and D10 products
Powered by ERDAS Catalog Solution
Compliance tested (against non-consolidated tests of IGN, CNR and INTECS)
Integrated in the HMA Portal
– Existing workflows
– Specific stylesheets
FRASCATI ESRIN 15th of December 2009 Slide 8
EO EP AchievementsEO EP Achievements
• Alternative Catalogue instance with metadata harvestedfrom VDP Compliant GML files Demonstrates on how extended “evaluation” metadata canbe offered from an EO EP CSW Compliant Cataloguewithout development of a new ebRIM-CSW EPUsing GetRecords for “Search” operationUsing GetRepositoryItem for “Present” operation to return “VDP compliant GML”
GetRepositoryItem in principle only HTTP GET bindingOne GetRepositoryItem call required for eachproductCompliancy tests fail due to “strict” comparisonbetween ebRIM and GML
FRASCATI ESRIN 15th of December 2009 Slide 9
EO EP CSW EO EP CSW ebRIMebRIM –– EO WMSEO WMS
• Browse images for catalogued products are served via the Web Map Service protocol using the InfoTerra UK WMS Application Schema for EO Products ReferenceImplementation
• Linkage from Catalogue metadata to EO Profile of WMS using the EO GML BrowseInformation/fileName element containing a WMS GetMap URL
• Interactive browse
FRASCATI ESRIN 15th of December 2009 Slide 10
Open IssuesOpen Issues
“Light” EO extension package approach• Problem:
Full mapping of EO Profile of GML to EO EP was initially done tominimise number of requests/responsesConsequence is that each (minor) change to or new product type within EO GML implies changes to EO EP of CSW ebRIM which makes EO GML redundant and EO EP of CSW hard to maintain
• Potential Solutions:Use of GetRepositoryItem to retrieve GML as demonstrated but changes to this operation are required to support SOAP and possibly allow multiple GML instances to be returned in responseto a single requestReturn of ebRIM and EO GML in a “composite message” structure using Multipart/MIME, SOAP attachments or similarUnder investigation in HMA FO project
FRASCATI ESRIN 15th of December 2009 Slide 11
Demonstration 1Demonstration 1
VGT4Africa EO EP ebRIM CSW Catalogue with EO WMS
FRASCATI ESRIN 15th of December 2009 Slide 12
VGT4Africa EO EP ebRIM CSW Catalogue with GetRepositoryItem
and EO WMS
Demonstration 2Demonstration 2
FRASCATI ESRIN 15th of December 2009 Slide 13
Future WorkFuture Work
Development of “official” EO GML derived application schemas for EO Synthesis and Systematic products. Generalising work performed in HMA-T by applying it to other product collections => addressed in HMA Follow On Task 1
Consolidation of the EO Product Discovery/ Evaluation / Ordering/ Data Access Chain scenarios and standards interlinkage involving CIM EP (collections and services), EO EP, EO GML, EO WMS, HMA Ordering and EO WCS
FRASCATI ESRIN 15th of December 2009 Slide 14
Open ActionsOpen Actions86: Propose a way to change EO GML to achieve what is in
RID SS-2: CR text is ready: proposed to take this up in the HMA-FO schema evolutions
186: Check with VITO whether URL to download products canbe provided => Implemented interactive browse instead
188: Move services to the operational environment and addlinks to SSE clients to HMA-T WIKI. => services are availableon services-test. Issue with deployment onservices.eoportal.org
FRASCATI ESRIN 15th of December 2009 Slide 15
Compliancy tests (1)Compliancy tests (1)Initial analysis of IGN Runs of compliancy tests (14/12/09)
• ATC1.2: ' ad hoc query. GIM VITO Catalogue does not support 'urn:ogc:def:ebRIM-Query:OGC:listExtensionPackages: Confirmed issue
• TC1.5 : Problem in mappings between repository item and extrinsic object (id: urn:ogc:def:EOP:VITO:VGT4AFRICA.ALBQ:VGT4AFRICA_ALBQ_20080211_Africa_POSTEL) : Confirmed Issue
• ATC1.6 : there is no rim:Classification inside the wrs:ExtrinsicObject (EOProductTypes classification): To bechecked
FRASCATI ESRIN 15th of December 2009 Slide 16
Compliancy tests (2)Compliancy tests (2)ATC1.12 : slot fileName must have type "anyURI", not "string" : Confirmed issue
ATC1.15 : slot fileName must have type "anyURI", not "string" : Confirmed issue
ATC1.18 : Two mandatory slots are missing on EOMaskInformation : fileName and format: Confirmed issue
Catalogue update to be provided by 15/01/2010
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