Know your data sources.

Montana DNRC trust-lands tracts (~13.9K), trust-lands lease lots (~657), conservation easements (~2.8K), and managed areas (~1.5K state parks + fishing access sites + WMAs + federal lands). - searchTrustLandsSurfaceTracts ⭐ 13,907 DNRC tracts; GrantID land-grant code (CS/CB/PH/UM/...) - searchTrustLandsLeaseLots ⭐ 657 active/pending/terminated leases; type RES/COMM/DEVREC/+ - searchConservationEasements ⭐ 2,769 easements; top holder Montana Land Reliance (40%) - searchManagedAreas ⭐ 1,531 state parks/FAS/WMAs/federal lands - getServiceInfo §0 spec drift: content split across two hosts (DNRC tenant + MT State Library MSDI). No county column on any layer. mt-bogc covers wells + MMB O&G leases on the same DNRC tenant; this connector covers everything else.

North Dakota Department of Trust Lands. AGOL Feature Services from owner jstegmiller@nd.gov_NDDTL; no auth. - searchOilGasLeases (~33K mineral tracts; 8.9K active) ⭐ filter county, lessee, eligible (default Leased) - getExpiringLeases ⭐ acquisition signal — leases expiring within windowDays - searchSurfaceLeases (~4.9K grazing/ag), getLeaseDetail, getServiceInfo upstream quirks: NDDTL does NOT publish OG-leases as a separate layer; they live inside the unified TrustLandsMineralsVW (filter lease LIKE '%OG-%'). exp/effective stored as MM/DD/YYYY string with " " for null. Counties Title-Case (different from ND DMR's UPPERCASE). landtrustdash.nd.gov is offline — AGOL views are the working public surface.

Utah SITLA — ~3.4M acres of trust lands; strongest state-trust portfolio per acre after TX. - searchOilGasLeases ⭐ ~851 active O&G mineral leases (10 production_status) - searchInactiveLeases ~5.5K historical / expired O&G leases - searchSurfaceOwnership ⭐ ~16K. owner=Fed/Private/State/Tribal; agency=BLM/SITLA/USFS - getLeaseDetail single-lease lookup by leasegis (ML22161.0) upstream quirks: TWO origins — /mapping/rest (UtahSITLA) for Contracts; /server/rest (plpcoadmin_agol) for Ownership. Active O&G is **layer 1 NOT 0** of Contracts_Oil_Gas. class has trailing spaces ('ML '). Active dates are epoch ms; inactive dates are MM/DD/YYYY strings. Active layer has NO county — bbox/near only.