Geolocation Schema Compatibility Matrix,,,,
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Schema/Standard,KGs Using,Interoperability Level,Normalization Needed,Notes
GeoSPARQL (OGC),"Geoconnex, SOC-KG, NIKG, SPOKE-OKN, Spatial KG, FRS KG, Hydrology KG",Direct,None - standard geometry representation,Industry standard for semantic geospatial
S2 Geometry (Google),"Spatial KG, FRS KG, Hydrology KG, SOC-KG, UF-OKN",Direct,None - hierarchical cell IDs,Enables efficient spatial indexing
STKO-KWG Ontology,"Spatial KG, SOC-KG, Hydrology KG",Direct,None - shared ontology,Common vocabulary for spatial relations
HY_Features (OGC),"Geoconnex, Hydrology KG",Direct,None - hydrology standard,Semantic hydrology modeling
Schema.org Geo,"DREAM-KG, Geoconnex, UF-OKN",Moderate,May need URI alignment,Web-oriented geo markup
FIPS Codes,"Spatial KG, SPOKE-OKN, Rural KG, SCALES",Direct,Standardize to 5-digit format,US geographic identifier standard
GeoNames,"Climate Models KG, SPOKE-OKN",Moderate,Align geonameid formats,Global gazetteer
ISO Country Codes,"SPOKE-OKN, Climate Models KG",Direct,Choose ISO2 vs ISO3,International standard
GADM Admin Regions,"Spatial KG, SOC-KG",Direct,Level alignment needed,Global administrative boundaries
Custom Ontologies,"SUDOKN, NIKG, Rural KG",Low,Mapping to standard vocabs,May require ontology alignment
WGS84 Coordinates,All KGs,Direct,Format standardization,Universal coordinate reference
