Maps & Spatial Data

Government Geospatial One-Stop

Federal GEODATA portal

Manual of Federal Geographic Data Products

Earth Science Enterprise EOSDIS System Home Page

Facilities Program Development Office Online GIS Services

NASA Land use/cover Change

Cooperative Institute for Marine Resources Studies

National Geophysical Data Center ESRI Thematic Map Project

National Ocean Service MapFinder Home Page

National Ocean Service Office of Coast Survey

Historical Climatology Network

Envirofacts Warehouse Maps On Demand

EnviroMapper

BASINS Project

Surf your watershed

C-MAP Clean Air Mapping

National Agricultural Statistics Service (NASS)

USDA Geospatial Data Gateway: Gateway

Forest Service Geospatial Service and Technology Center

National Forest Service

NRCS Data Resources

NRCS National Cartography and Geospatial Center

NRCS Certified Watersheds

GIS and Spatial data

National Wetlands Inventory

CIMS Chesapeake Bay Program Information Management

ICPRB Interstate Commission of Potomac River

Geography and Map Reading Room Library of Congress

Infromation and Services National Imagery and Mapping Agency (NIMA)

Geospatial Data U.S. Army Corps of Engineers

Geospatial Home Page U.S. Bureau of Land Management

MPGIS Service Center Geospatial Information and Resources U.S. Bureau of Reclamation

Natioanl Park Service GIS Home Page National Park Service

Office of Geographic Information Services U.S. Department of Transportation