OGC Filter Encoding 2.0 Encoding Standard - Spatial Filtering

AFOD 2.0.0 supports the retrieval of AIXM 5.1.1 features located fully or partially in a referenced airspace identified by its gml:identifier (UUID). The following spatial operators are supported: Beyond, Contains, Crosses, Disjoint, DWithin, Equals, Intersects, Overlaps, Touches and Within.

Reference

ADM XML Primer - Section 2.3.6.1.6

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