Stephen Salyer: DLG

DLGs, or Digital Line Graphs, are very similar to DRG's, however instead or useing the raster, 'dot' or pixel style of creating a GIS image, these use 'line' or vector data to create their representation. Below is a perfect example of an image created using the very populat ArcGIS system, specifically ArcView, which can create both raster and vector images.