GIS204 Konza Prairie USGS Topographic Map: This topographic DRG is supplied by the USGS and provides topological information about the Konza Prairie Biological Station. The Digital Raster Graphic (DRG) is a scanned image of a US Geological Survey (USGS) standard series topographic map that includes all collar information (e.g., legend, scale bar, index map, etc.) The DRGE is a non-proprietary product of a USGS DRG in which the map collar information has been removed.