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| | raster graphics - a Whatis.com definition - see also: rasterized |
 | | Raster graphics are digital images created or captured (for example, by scanning in a photo) as a set of samples of a given space. | | | A raster file is usually larger than a vector graphics image file. | | | A raster file is usually difficult to modify without loss of information, although there are software tools that can convert a raster file into a vector file for refinement and changes. |
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http://whatis.techtarget.com/definition/0,,sid9_gci212871,00.html
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| | TVA: Digital Raster Graphics |
| | A Digital Raster Graphic (DRG) is a raster image of a published map, made by scanning a published paper map on a high-resolution scanner. | | | Visit the U.S. Geological Survey’s Mid-Continent Mapping Center DRG page for more information on DRGs. | | | The raster image is georeferenced and fit to the Universal Transverse Mercator (UTM) or a State Plane coordinate system. |
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http://www.tva.gov/river/mapstore/map_digital.htm
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| | Digital Raster Graphics |
| | A digital raster graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) standard series topographic map, including all map collar information. | | | The image inside the map neatline is georeferenced to the surface of the earth and fit to the Universal Transverse Mercator projection. | | | You may also order DRGs online from USGS Earth Explorer. |
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http://topomaps.usgs.gov/drg
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| | WDNR - Digital Raster Graphics a.k.a. Topographic Maps |
| | Digital Raster Graphics (DRGs) are optically scanned map images originally produced by the US Geological Survey (USGS). | | | 1x1 Degree Cell Index Graphic for 7.5 Minute DRGs | | | The users reporting viewing problems generally indicate that the USGS-produced DRGs display correctly, so if you experience problems viewing the DNR-enhanced DRGs, we suggest you obtain the images directly from the USGS (refer to the link at the top of this page). |
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http://www.dnr.state.wi.us/maps/gis/datadrg.html
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