The WV GIS Technical Center publishes serveral ArcGIS Rest Services for use by the general public. To access our rest services, either point your ArcCatalog or your web browser to: http://services.wvgis.wvu.edu/ArcGIS/rest/services

For more information concerning adding web services to ArcGIS 10.1, please see ArcGIS Help on the topic. For other pieces of software, please see the help for the particular software. If your software does not support ArcGIS Rest Services, please see our data clearinghouse to download individual files of datasets.

FILE FORMAT

Definition:

Notes on Use: Due to the large amount of data involved, all files are archived and compressed into a single zip file for easy downloading. Single-precision coverages can store up to seven significant digits for each coordinate, double-precision coverages up to fifteen significant digits. File Type Extension Name Vector *.shp *.e00 *.dlg ArcView Shapefiles (*.shp, *.shx, *.dbf) Arc/Info Export files USGS DLG Optional Image .tif/.tfw *.tif *.img INFO folder TIFF (Tag Image File Format / World File) GeoTIFF (TIFF with Geo header) IMAGINE (ERDAS IMAGINE) ArcInfo GRID (ESRI Grid File) Compression *.sid *.zip MrSID (Multiresolution Seamless Image Database) Zip files (.zip)

The Geodetic Control / Surveying Task Force recommended to the WV GIS Steering Committee that all agencies mapping geographic data within West Virginia utilize one of the following three coordinate systems: Geographic Coordinate System, Universal Transverse Mercator, or State Plane Coordinate System, all referenced to the North American Datum of 1983. Only these coordinate systems and datum will serve as the official data exchange standard for GIS data sets that make up the West Virginia Spatial Data Infrastructure. In August 2002, the new standard was approved by the WV GIS Steering Committee.

• Standards for WV Coordinate Systems (Approved August 2002)
• State Plane Coordinate System (SPCS) for WV Counties (West Virginia State Code)
• Datum Shifts And Digital Map Coordinate Displays (USGS paper, March 2001)
• State Plan Coordinates in Both Meters and Feet

West Virginia Coordinate Systems

Typically three coordinate systems are utilized in West Virginia:

1. Geographic (Latitude/Longitude) for general referencing and data distribution
2. Universal Transverse Mercator (UTM) for statewide GIS data sets
3. State Plane Coordinate System (SPCS) for countywide data sets

File name extensions reflect the type of coordinate system.

Coordinate System	Projection	WV Zones	Map Units	File Extensions
Geographic (Latitude/Longitude)	None	None	Decimal Degrees	LL83 (NAD 83) LL27 (NAD27)
Universal Transverse Mercator (UTM)	Universal Transverse Mercator (UTM)	17N and 18N	Meters	UTM83 (NAD83) UTM27 (NAD27)
State Plane Coordinate System (SPCS)	Lambert Conformal Conic	North and South	Feet	SPN83 (North Zone, NAD83) SPS27 (South Zone, NAD27)