Shapefile Format –The BLM Colorado State Office periodically generates the GIS dataset for authorized and pending coal lease cases. Lease records are selected from BLM’s LR2000 database for the following case types:340001 –Coal lease341001 –Coal exploration license342001 –Regional coal lease - competitive342504 –Regional competitive emergency/bypass342505 –Non-regional competitive coal lease - LBA342506 –Coal lease - hardship343001 –Coal lease preference right. A Python script then uses the legal land descriptions contained in the extracted LR2000 records to generate a shapefile. BLM’s Geographic Coordinate Database (GCDB) is used as a geographic reference to create the polygon features in the lease GIS dataset. The GIS dataset is projected to NAD83/UTM13N and any geometry errors introduced during processing are repaired.