Place(s): Massachusetts, Brookfield, Brimfield, Charlton, East Brookfield, Holland, North Brookfield, Palmer, Southbridge, Spencer, Stubridge, Wales, Ware, Warren, and West Brookfield Subject(s): imageryBaseMapsEarthCover, Maps, Topographic, Geological Survey (U.S. AGC also had a hand in converting all the nearly 60,000 USGS Digital Raster Graphic GeoTIFF files (based on the tagged image file format) into GeoPDF using. The names of quadrangles which border this one appear on the map collar in their respective positions (N,S,E,W) in relation to this map. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map. The image inside the map neatline is geo-referenced to the surface of the earth and fit to the Universal Transverse Mercator projection. To do this, you need a topographic map in Digital Raster Graphics (DRG) format, which is another map data type produced by the USGS. Geological Survey (USGS) standard series topographic map, including all map collar information. A digital raster graphic (DRG) is a scanned image of a U.S. The survey date (ground condition) of this map is 1886-1887, the edition date is April, 1893 and the map was reprinted in 1942. INTRODUCTION In a Geographic Information System (GIS), the geologic data gathered through fieldwork is usually, but not always, registered to a Digital Raster Graphics (DRG) image, and attribute information that further explains each of the geologic features is added. This layer is a digital raster graphic of the historic 15-minute USGS topographic map of the Brookfield, Massachusetts quadrangle.
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