The Tribal grasslands feature layer is intended to display the approximate amount of grasslands represented in U.S. Survey Acres, that are contained within the boundaries of American Indian Land Area Representations (LAR). This Includes a feature layer generated from running the Summarize Within solution. The data does not include Alaska and may not include all BIA LAR areas. This map is only intended to highlight areas that that include grasslands within tribal boundaries. The geographic acreages contained in this dataset are not derived from legal documents associated with title documents or survey records. Rather, they are computed by area calculation in the mapping software. It is important to note, area and distance calculations in the mapping software require that the data be in a projected coordinate system and that different projected coordinate systems can result in different calculated values for area or length. It is recommended that the Universal Transverse Mercator (UTM) Projection for the UTM zone where the data is contained be used to calculate area or distance. National Grassland data is derived from the U.S. Forest Service "Original Proclaimed National Forests and National Grasslands", which can be found in the ESRI Living Atlas. This layer is filtered to only display National Grasslands as determined by the USFS. This viewer provides tools to assist with research, planning, and reporting. Land cover data is compiled from the National Land Cover Database (NLCD). The United States NLCD is as current as 2021 and can be found within ESRI’s living atlas. The original NLCD data can be found here. Land Area Representations of tribal boundaries and the BIA regions represented in this dashboard were created by the BIA. Please feel free to contact BOGS at 1-877-293-9494 geospatial@bia.gov