Links listed below that have the have the following 
icon behind them indicate GIS data is available for download at no cost to the public; the 
icon indicates the link has an interactive viewer available.
South Carolina Sites:
- SC.GOV - Official Web Site of the State of South Carolina
- South Carolina Association of Counties - link is to a list of County web sites. Note: Many counties have GIS data available through interactive web applications.
- SCGIS, State GIS Coordinator Dr. Tim DeTroye - Download
- Digital Cartography & Precinct Demographics , Office of Research & Statistics -
Download
- Geodetic Survey , Office of Research & Statistics
- Download
- USC GIS Data Server - Download
- SC DHEC GIS Data and web applications - Download Viewer
- GeoSpatial One-Stop - Download Viewer
- The National Map, USGS -
Download
Viewer
- The National Atlas -
Download Viewer
- FEMA
- National Park Service
- National Wetlands Inventory
- Wetlands Data:GIS data Download
or Wetlands Mapper Viewer
- Wetlands Data:GIS data
- U.S. Census Bureau
- Census Bureau Geography
-
Download
- Census Bureau Geography
-
- U.S. Fish & Wildlife Service National Cadastral Data
-
Download
- U.S. Geological Survey (USGS)
- National Geospatial Data Clearinghouse, U.S. Geological Survey Node
- Digital Line Graphs
-
Download
- Digital Elevation Models
-
Download Viewer
- Digital Orthophoto Quadrangles
- Digital Raster Graphics
- Digital Line Graphs
-
- National Hydrography Dataset
-
Download Viewer
- USGS NHD download by State -
Download
- Topographic Maps from USGS as GeoPDF -
Download
- Historical Topographic Maps, USGS Store
-
Download
- Topographic Map Symbols Index
-
Download Viewer
- Water Resources of of the United States
- Download
- National Geospatial Data Clearinghouse, U.S. Geological Survey Node
- EarthExplorer, Viewer and Available Online Data from USGS - Viewer
- USDA Natural Resources Conservation Service
- Geospatial Data Gateway
-
Download
Viewer
- NRCS Soil Data Mart: Soil data and reports
-
Download
- NAIP imagery -
Download
- NRCS Soil Data Viewer extension to ArcMap.
- Geospatial Data Gateway
-
- US Environment Protection Agency (EPA)
- Ecoregion Maps and GIS Resources
-
Download
- Ecoregion Maps and GIS Resources
-
- Free GIS Data and Image Viewers (listed in alphabetical order):
- ArcExplorer by ESRI
- GeoViewer 4.0 by LizardTech
- MapWindow by Idaho State University Geospatial Software Lab.
- TatukGIS Viewer and on-line tutorials.
- ColorBrewer - select good color schemes for maps.
- GeoCommunity
- Shaded Relief Ideas and Techniques