Know your data sources.

Oklahoma Corporation Commission (OCC) live ArcGIS REST. No auth. 26 methods, 49 layers. DOMAINS: - Wells: searchWells, getOrphanWells, getStateFundsWells, getWellLogs, getCompletions, getHorizontalLaterals, getUICWells. - Permits: getPermits (ITD). - Units/Rules: getDrillingUnits, getFieldRules. - Seismicity: getInducedSeismicity({zone}). - Surface: getFacilities, getOilGasIncidents, getGasStorage, getPSTTanks/Releases. - Water: getHydrology, getBaseTreatableWater, getPublicWaterSupplyWells/Intakes, getGroundwaterWells. - Geology/Cadastral: getSedimentaryBasins, getCadastral, getDistricts. - Generic: queryLayer({layer,...}) for any listLayers() key. Returns {features, geojson, total}. geojson → patchops_addMapLayer. Page cap 2000. Production volumes at OK Tax Commission.

TxGIO — Texas Geographic Information Office (formerly TNRIS), the state GIS clearinghouse, through public ArcGIS REST services. Runs on PatchOps' shared ArcGIS engine and returns WGS84 GeoJSON for incorporated cities, legislative districts, 1:250k geology, NHD hydrography, and StratMap parcel polygons. The parcel MapServer is exposed through bounded service-level identify queries with typed filters and truncation disclosure. Complements rrc, tceq, twdb, and tx-glo. No auth.