GeoSPARQL Geographic Query Language
OGC standard for geospatial data in RDF plus SPARQL spatial query extensions.
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Where this one tends to earn its keep.
Spatial queries over linked geographic data
GIS data published as linked data
Location-based service backends
Geospatial knowledge graph construction
I haven't checked this label against the actual licence text — it's the catalogue's original guess. Check the ontology's own site before you rely on it.
Others worth a look in Geospatial.