Cell maps are created by the USGS as a method for illustrating the degree of petroleum exploration, type of production as indicated by final well status, distribution of production and well density in a given area; in this case, covering the SaMiRa project area of interest. Each cell represents a quarter-mile square of the land surface, and the cells are coded to represent whether oil and gas wells included within the cell are predominantly oil-producing, gas-producing, both oil and gas-producing, dry or the type of production of the wells located within the cell is unknown. The well information was initially retrieved from the IHS Energy Enerdeq, which is a proprietary, commercial database containing information for most oil and gas wells in the United States. Cells were developed as a graphic solution to overcome the problem of displaying proprietary well data. No proprietary data are displayed or included in this dataset. The data from IHS were current as of February 2016. This particular cell dataset was created for the Sagebrush Mineral Resource Assessment project (SaMiRa). Please see the purpose section for further information on SaMiRa.