A Digital Raster Graphic (DRG) is a scanned image of a U.S. Geological Survey (USGS) topographic map. An unclipped scanned image includes all marginal information, while a clipped or seamless scanned image clips off the collar information. DRGs may be used as a source or background layer in a geographic information system, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of digital line graph data. The DRGs also can be merged with other digital data (e.g., digital elevation model or digital orthophotoquad data), to produce a hybrid digital file. The output resolution of a DRG varies from 250 to 500 dots per inch. The horizontal positional accuracy of the DRG matches the accuracy of the published source map. To be consistent with other USGS digital data, the image is cast on the UTM projection, and therefore, will not always be consistent with the credit note on the image collar. Only the area inside the map neatline is georeferenced, so minor distortion of the text may occur in the map collar. Refer to the scanned map collar or online Map List for the currentness of the DRG.

Digitized off of USGS 1:24,000-scale Digital Raster Graphics (scanned topographic maps) by the West Virginia Department of Environmental Protection. First published January 2002, updated with Census 2000 attribute data and re-published March 2005.

West Virginia State Boundary. Digitized off of USGS 1:24,000-scale Digital Raster Graphics (scanned topographic maps) by the West Virginia Department of Environmental Protection. WVGISTC dissolved county boundaries to create state boundary. Published May 2002.

An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation has been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. For this dataset, 2-foot pixel resolution natural color digital orthimages were obtained from the West Virginia Statewide Addressing and Mapping Board. The orthoimages were mosaicked and reprojected by the USGS from the original 2-foot pixel, West Virginia North and South State Plane (feet) Coordinate Systems to Universal Transverse Mercator (UTM) (meters), Zone 17, NAD83 datum. Each orthoimage (DOQQ) provides the equivalent to a quarter of a 7.5-minute map (3.75 minutes of latitude and longitude) with overedge. The overedge is approximately 300 meters beyond the extremes of the corners of coverage. The naming convention is based on the U.S. Geological Survey 1:24,000 Topographic Map Series with the quadrant abbreviation, i.e. athens_ne.tif, etc. This data set covers the entire state of West Virginia including into UTM zone 18 on the east edge.

Tax District Boundaries: Official tax district boundary lines adopted by the WV Legislature in 1978 as a general reference to delineate rural tax district boundaries. The boundaries were drawn from 1:24,000-scale USGS topographic maps in 1978 and coincide with county magisterial districts as of July 1, 1973. Unlike magisterial districts that are realigned every ten years following the census, the tax district boundary does not follow equal representation requirements.

Drainage basin areas for 376 USGS streamgages in West Virginia and adjacent states were delineated digitally. The USGS Watershed Boundary Dataset HUC12 sub-watershed lines were used as outer limits of basins, and heads-up digitizing was used to delineate boundaries from the stream gage to the HUC12 boundary. The USGS National Map was used, as background, to show both contour lines and digital elevation to highlight drainage basin divides, ridges, and valleys. Basins were delineated for (1) all active continuous-flow and crest-stage streamgages, in West Virginia, through water year 2020, (2) selected inactive streamgages, in West Virginia and adjacent states, that were used in the flood-frequency report prepared by Wiley and Atkins (2010), (3) Selected streamflow stations in West Virginia included in the low-flow report by Wiley and Atkins (2006), 4) historic West Virginia streamgages with published daily flow values, and (5) selected stage-only streamgages.For some historical streamgages included in this dataset, either the basin perimeter or the stream location have been altered by human activity since the gage was operated. Drainage basins for these streamgages were digitized from topographic maps contemporaneous with the period of streamflow record, so that their published drainage areas would continue to accurately reflect the drainage area when streamflow data were collected. Streamgage 03198022 was digitized from the 1971 topographic map because the basin perimeter was altered by construction after the streamgage was discontinued, and streamgages 03212567 and 03213495 were digitized from 1968 topographic maps because the basin perimeter was altered by surface mining after the streamgage was discontinued. Streamgages 03055040 and 03059500 were operated on streams that have been moved substantially since the streamgages were discontinued; basins for these streamgages were digitized from the historic streamgage locations, which are no longer on streams. Six streamgages, 01607000, 01636451, 01636462, 03060000, 03181000, and 03183200 are included in the point file for completeness, although no basins were delineated for them because they were on springs or karst-affected streams where the surface drainage basin was known to have little relationship to the actual drainage basin. Drainage basin areas, provided in this data release were updated in the National Water Information System (NWIS). Provided in the file 'WVBasinboundary.zip' is a geodatabase with (1) a point feature class of streamgage stations as described above (WV_Surfacewater_sites), (2) a feature dataset that contains the digitized drainage areas in polygon(WVBoundary_poly) and line (WVboundary_arc) format.

From the site: "Karst regions derived from 1968 geological map of West Virginia.

In 1968 the West Virginia Geological and Economic Survey (WVGES) published a State Geologic Map. The topographic base was compiled from Army Map Service 1:250,000 scale map sheets. In 1998 the WV Division of Environmental Protection (WVDEP) scanned the hardcopy geologic maps at 300 dpi, 8-bit color, and then georeferenced them. Rock unit boundaries were digitized off the images and attributed by WVDEP. The USGS-Water Resources Division later revised the attributes of large water bodies and georeferenced the datum to NAD83. The WV Bureau of Public Health extracted the limestone and dolomite formations from the statewide geologic coverage to create a separate karst GIS coverage."

This is High resolution satellite carries two PAN sensors with 2.5m resolution and fore-aft stereo capability. The payload is designed to cater to applications in cartography, terrain modeling, cadastral mapping etc. Standard products are full scene (path-row) based geo-referenced as well as geo-orthokit products.