Frequently asked questions on coverages and coverage services. -- PeterBaumann - 30 Jun 2014
How to represent a 0-dimensional coverage?
Related issues: What happens when all the CRS dimensions get sliced in a WCS request? How to encode the GMLCOV description?
Answer: As per GMLCOV, the domain set of a coverage cannot have 0 dimensionality: the //gml:domainSet/@dimension attribute shall be greater or equal than 1. There is no clear guidance on 0-D in the OGC standards,
The recommended solution is to represent such a coverage by the single (atomic or composite) range value in the range set and an empty empty domain set .
Example: See the rasdaman WCS test oracle for 0-dimensional output rectified grids: browser:systemtest/testcases_services/test_wcs/oracle/18-get_coverage_0D.oracle.