Standards
Coverages represent digital geospatial information representing space/time-varying phenomena. OGC Abstract Topic 6 - which is identical to ISO 19123 - defines an abstract model of coverages. As such, it is not a suitable basis for implementations: many implementations are conceivable which all conform to this abstract model, but are not interoperable. This coverage model is concretized to the level of interoperability by the OGC standard GML 3.2.1 Application Schema - Coverages (often referred to as GMLCOV) which in turn is based on the Geography Markup Language (GML) 3.2, an XML grammar written in XML Schema for the description of application schemas as well as the transport and storage of geographic information.
The European legal framework for a unified Spatial Data Infrastructure, INSPIRE, in its Annex II and III relies on the OGC definitions of coverages as well, but modifies them in places in a way making them less compatible and interoperable with the OGC standard. For example, components of the coverage concept are selectively recombined into new, different definitions of a coverage.
Read more about this topic: Coverage Data
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