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March 2026 data from the Bureau of Land Management (BLM) Colorado, describing polygon geometry and linked attributes for quarterly oil and gas lease sale parcels in the state. The polygons were generated using legal land descriptions and the Geographic Coordinate Data Base (GCDB) survey grid, with data consolidated from Field Office inputs. An error file may accompany the dataset, showing polygons that did not process automatically or were manually completed by a GIS specialist.
Data is in the public domain (us-pd license). Users are advised to check mapped parcels against the legal land descriptions in the sale notice for validation.