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keyword

value

source

service

WCS

Mandatory WCS standard value

request

GetCoverage

Mandatory WCS standard value

version

1.0.0

One of the mandatory WCS standard values returned by returned by the request=GetCapabilities

BBOX

0,50,10,55

bounding box: min(longitude),min(latitude),max(longitude),max(latitude)

coverage

topo

one of the ContentMetadata name returned by request=GetCapabilities. WCS counterpart of WMS layers

format

GeoTIFF,NetCDF3,NetCDF4,AAIGRID

Unlike WMS, the available formats (encoding types) are not returned by request=GetCapabilities, but by an extra call with request=DescribeCoverage. Well-known formats for WCS servers are: GeoTIFF,NetCDF3,NetCDF4 and AAIGRID (Arc Ascii Grid).

These keywordd return data in the native resolution, some servers demand specification of a target grid:

keyword

value

source

crs

crs:84

coordinate system

resx

0.1

resolution

resy

0.1

resolution

Unlike WMS, to known which encoding formats are available, there is a separate request value DescribeCoverage
http://geoport.whoi.edu/thredds/wcs/bathy/srtm30plus_v6?service=WCS&request=DescribeCoverage&version=1.0.0
which is available when the request=GetCapabilities contains

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