Deutsches Fernerkundungsdatenzentrum WCS 1.0.0, B. Buckl 1 CEOS WGISS Data Services Task Team OGC WCS OGC WCS Status Chiang Mai, Bernhard Buckl, DLR

Deutsches Fernerkundungsdatenzentrum WCS 1.0.0, B. Buckl 2 WCS  Subject to TC vote during the OGC meeting in October 2003  Version with slight corrections expected very soon  Version aimes at simplicity  Grid coverages only no 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

Deutsches Fernerkundungsdatenzentrum WCS 1.0.0, B. Buckl 3 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

Deutsches Fernerkundungsdatenzentrum WCS 1.0.0, B. Buckl 4 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)

Deutsches Fernerkundungsdatenzentrum WCS 1.0.0, B. Buckl 5 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