In most cases, the ability to view the DRG format is very much secondary to viewing their own proprietary formats. This review is focused very narrowly on the ability to view DRG maps, and is of no value in judging the products capabilities for other uses. Please consult the vendors websites for trademark information. Displays maps in the Digital Raster Graphics format. The maps can be scrolled and the magnification changed.
Some viewers can also display position with latitude and longitude.
GPS units can indicate in UTM, and the UTM grid appears on the regular, printed USGS maps. Annotations can NOT be added to the maps. Selected areas of the maps can be printed. Distances between points can be measured. Inc. Geographic Explorer QuickView by Blue Marble Geographics.