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Coverages Primer
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Terms of Reference
OI: Orthoimage - RGB Image
Use case:
Download RGB orthoimage, ready for visualization
Dataset:
ICGC
RGB Orthoimage; coverage created from GeoTIFF and separate XML file with INSPIRE metadata
Service used:
OGC WCS, WCPS
Notes:
WCPS queries like this typically are generated automatically by some client or script, users will not notice them.
WCS request
https://inspire.rasdaman.org/rasdaman/ows? service=WCS & version=2.0.1 & request=GetCoverage & coverageId=INSPIRE_OI_RGB & subset=E(494500,496000) & subset=N(4654300,4655000) & format=image/jpeg
WCS Result
Next, we do the same with WCPS - just subsetting:
WCPS query
for $oi in (INSPIRE_OI_RGB) return encode( $oi[ E(494500:496000), N(4654300:4655000) ], "image/jpeg" )
WCPS Result