Cross-KG Geolocation Linking Potential,,,,,
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Linking Mechanism,KGs Connected,Integration Strength,Common Identifiers,Use Cases,Challenges
S2 Cell Level 13 Index,"Spatial KG, FRS KG, Hydrology KG, SOC-KG, UF-OKN",HIGH,"S2 Cell IDs, spatial:connectedTo","Cross-domain spatial joins, facility-hydrology links, contaminant pathway analysis",Requires S2 cell computation for new data
FIPS Codes (County),"Spatial KG, SPOKE-OKN, Rural KG, SCALES",HIGH,5-digit County FIPS,"Health-justice correlations, rural health analysis, environmental justice",Some variation in FIPS encoding
GeoSPARQL WKT Geometries,"Geoconnex, SPOKE-OKN, SOC-KG, NIKG",HIGH,"geo:asWKT, sf:Point/Polygon","Spatial queries, overlap analysis, buffer zones",CRS standardization needed
GeoNames IDs,"Climate Models KG, SPOKE-OKN",MEDIUM,geonameid property,"Climate-health linkages, global location matching",Not all KGs use GeoNames
ISO Country Codes,"SPOKE-OKN, Climate Models KG",MEDIUM,"ISO3, ISO Alpha-2",International data integration,Limited to country granularity
GADM Admin Hierarchy,"Spatial KG, SOC-KG",HIGH,KWG Administrative Region URIs,"Hierarchical aggregation, admin unit queries","US-focused, limited international"
ZIP Codes,"SPOKE-OKN, SUDOKN, SCALES, Rural KG",MEDIUM,5-digit ZIP,"Address-level linking, service area analysis",ZIP-county mismatches
Lat/Long Coordinates,All KGs,MEDIUM,Decimal degrees (WGS84),"Point-based spatial joins, proximity queries",Precision and format variations
HY_Features Ontology,"Geoconnex, Hydrology KG",HIGH,"Catchment, Flowpath URIs","Water feature integration, flow tracing",Hydrology-specific
Data Commons URIs,"FRS KG, Spatial KG",HIGH,dcid: identifiers,"Census data linkage, socioeconomic integration",Requires Data Commons alignment
