CEOS WGISS Data Services Task Team

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CEOS WGISS Data Services Task Team
OGC WCS 1.0.0
Status Chiang Mai, 2003-09-16 Bernhard Buckl, DLR
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WCS 1.0.0

• Subject to TC vote during the OGC meeting in
  October 2003
• Version 1.0.1 with slight corrections expected
  very soon
• Version 1.0.0 aimes at simplicity
• Grid coverages onlyno multipoint, segmented
  curve etc.
• Request encodings Key Value Pair or XML
• Transport HTTP GET or POST, prepared for
  SOAP(SOAP envelope needs to be wrapped around
  XML encoding only)
• Three request types- GetCapabilities-
  DescribeCoverage- GetCoverage

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Request Types

• GetCapabilities
• 3 sections Service, Capability, ContentMetadata
• Service - Mininum human readable service
  description
• Capability -Describes available request types,
  exception format and vendor specific capabilities
• ContentMetadata - Brief coverage descriptions
  (name, label, keywords, overal geotemporal
  extent)- link to external catalogue

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Request Types

• DescribeCoverage
• Requests detailed descriptions of all or a subset
  of available coverages
• Brief description - Domain Set describes the
  geotemporal domain in more detail also allows
  for coverages defined in the temporal domain
  only- Range Set describes the value ranges of
  the coverage observables may be simple (e.g.
  monthly sea surface temperature average) or
  compound (e.g. multiple spectral bands) defines
  constraints for a coverage request- Supported
  Coordinate Reference Systems EPSG,OGC codes and
  other CRS (link to external definition)

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Request Types

• DescibeCoverage (cont.)
• ...- Supported Formats arbitrary but one of
  HDF-EOS, GeoTIFF, DTED, NITF and GML is
  mandatory (examples to be provided)-
  Supported Interpolations nearest neighbor,
  bilinear, bicubic etc. if a coverage request
  requires resampling
• GetCoverage
• Requests a single coverage using the above
  properties as request criteria