Know your data sources.

Arizona Oil & Gas Conservation Commission inventory: 1,241 well points plus sedimentary-basin and county-subdivision polygons from a 2023 snapshot. searchWells filters API, name, operator, county, status, or type; getWellsInBBox handles bbox/radius; polygon methods return GeoJSON. Well data is FeatureServer layer 7; layers 1-6 are generalized overlays, not wells. Status/type filters are case-insensitive because source casing varies. getCounties returns Census subdivisions, not the 15 counties. Native CRS is WGS84.

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.