Know your data sources.

Alaska DNR state trust lands + mineral permits/leases + state mining claims + land-status overlays — Land Records System via ArcGIS REST. - searchOilGasLeases ⭐ ~1.7K active O&G + offshore leases (1.95K MineralPermitOrLease) - searchOilGasLeaseSaleTracts ⭐ ~6.3K active sale-tract polygons - searchMiningClaims ⭐ active 38.4K / pending 191 / closed 79.5K - searchLandStatus 4 curated layers: lease 5.2K / mineralOrder 4.5K / miningClaims 120K / stateLand 27K - getLeaseById, listLayers, getServiceInfo §0 spec drift: dog.dnr.alaska.gov returns HTTP 500 on every query — public surface is arcgis.dnr.alaska.gov. AK has NO borough column on these layers — use bbox/near.

Florida Department of Environmental Protection — permitted O&G wells plus environmental cleanup sites and state conservation lands, all folded into one connector. - searchOilGasWells ⭐ 1,477 permitted wells with company, county UPPERCASE, status (DRY HOLE/P&A, PROD, P&A, INJ, SWD) - searchEnvironmentalSites ⭐ 10,245 DEP cleanup sites — PETRO/BROWN/PFAS/SUPER/OTHCU - searchManagedLands ⭐ typed: brownfield (620) | aquatic-preserve (44) | conservation-land (3,215) - getWellByPermit, getServiceInfo §0 spec drift: FNAI SFWMD endpoint 403's — replaced with publicly readable FDEM AGOL FS/43 (same FNAI lineage). OIL_WELLS native CRS EPSG:6439 (FL Albers HARN). CLEANUP_SP has only numeric county ID. AQUATIC_PRESERVES uses plural COUNTIES.

Indiana DNR oil and gas wells + natural-gas pipelines plus DNR-managed lands (nature preserves, recreation sites, forestry tracts) via the gisdata.in.gov state Hub. - searchWells ⭐ ~78.3K wells with county/lease/permit/status — no operator on this layer - searchPipelines ⭐ ~215 interstate + intrastate gas pipelines with operator names - searchManagedLands ⭐ typed: nature-preserve | recreation-site | forestry-tract - getWellByIgsId, getServiceInfo §0 spec drift: brief listed portal.igs.indiana.edu as primary; rich registry actually lives on gisdata.in.gov state Hub. maps.indiana.edu root is HTML 404. operator_name on OilAndGasWells is ALWAYS NULL upstream. CRS varies (102100/4269/26916); outSR=4326.