Know your data sources.

Arkansas Oil & Gas Commission well inventory, Smackover-Norphlet lithium-brine lease polygons, and historical pipelines via the Arkansas State GIS Office. - searchWells ⭐ ~38.2K wells with permit/operator/welltype/status/county/section - searchLithiumLeasedAreas ⭐ ~7 lithium-brine polygons (Standard Lithium + ExxonMobil) - searchPipelines ~719 USGS-1986 historical polylines - getWellByPermit, getServiceInfo §0: build-plan said Location/FeatureServer — has only GNIS names, NO O&G. Canonical wells at Utilities/FeatureServer/5. Fields lowercase (operatorname); counties UPPERCASE (UNION 7.1K, 19%). wellstatus has "ex" typo alongside "EX". CRS 26915; outSR=4326.

Pan-EU harmonized offshore oil & gas — OGC WFS 2.0.0, no auth. 18 EU countries (Croatia, Cyprus, Denmark, Faroe Islands, France, Germany, Greece, Ireland, Italy, Latvia, Malta, Montenegro, Netherlands, Norway, Poland, Portugal, Spain, UK). Annual refresh — breadth filler; prefer sodir/nsta for authoritative national data. Layers: - hydrocarbons (~28.5K wells) ⭐ status/purpose/content/country filters - platforms (~1.6K) ⭐ currentStatus/category/primaryProduction - pipelines (~3.9K) ⭐ medium/status/country - activelicenses (~1.3K polygons) type/country

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.

Mississippi Oil & Gas Board well-surface locations, onshore and offshore pipelines, and offshore platforms via FracTracker-curated AGOL services. - searchWells ⭐ ~8.1K canonical wells with API/operator/status/county/field/township - searchPipelines ⭐ ~3.5K (712+727 onshore lean + 2K offshore BSEE-style) - searchOffshorePlatforms ⭐ ~617 platforms with COMPLEX_ID, INSTALL_DA, REMOVAL_DA - getWellByApi, getServiceInfo §0 spec drift: build-plan endpoint (Mississippi_NEW2) has NO structured wells layer — its "Merge 7" point layer (6,557 KML-imported records) only exposes PopupInfo HTML strings. Canonical structured wells live at Mississippi_Update_4821/0. Native CRS already EPSG:4326. CountyName UPPERCASE.

Pennsylvania DCNR Bureau of Forestry. State forest + park boundaries + O&G infrastructure on state forest land. - searchOilGasInfrastructure ⭐ Pads (~941) + Pipelines (~762). Reframed from spec searchStateForestLeases. - searchStateForests (661 polys / 20 districts), getServiceInfo upstream quirks: DCNR does NOT publish state-forest mineral leases as Feature Service — lessee data is PDF-only. Method reframed against BOF/OilGasInfrastructure (the geometry of leased activity). Pad_Type / Status / Pipeline_Type are SmallInteger codes — decoded via published domains. Status 10=Active / 4=construction complete / 7=reclaimed; Pad_Type 1=gas well / 4=compressor / 10=Monitoring; Pipeline_Type 1=Gathering / 6=Trunk. Pads layer has NO operator (Pipelines does).

Texas RRC oil & gas regulatory data (Postgres/PostGIS). Wells, production, pipelines, permits, inspections, violations, gas plants, fields, orgs. RULES: 1. No auth. 2. searchWells/searchWellsByArea for discovery. county is NAME (e.g. "MIDLAND") — auto-resolved. 3. Nearby: flat latitude/longitude/radius_meters. 4. getWellDetail when API known. getWellProduction for lease monthly. 5. Pipeline lines: getPipelineGeoJSON or searchGisPipelines + patchops_addMapLayer({geojson}). 6. searchPipelineSegments/getPipelinesNearLocation are DISCOVERY only — do NOT map centroids as points. 7. Flow: getPipelinesNearLocation → getPipelineGeoJSON({segment_ids:[id]}). 8. NEVER simulate pipeline routes. Stop at discovery if geometry missing. 9. searchGisSurveys + patchops_addMapLayer for parcel polygons.