- Geodata.gov U.S. maps and data
- GIS Data Depot (A comprehensive supersite for GIS data worldwide)
- GIS Jobs Clearinghouse
- GIS Jobs
- GIS Tools and Training (via UC Berkeley)
- Guide to On-line And Mostly Free U.S. Geospatial and Attribute Data (compilation sponsored by CAST)
- INSIDE Idaho
- Metadata Primer for Map Librarians
- Microsoft TerraServer
- Alexandria Digital Library
- Bureau of Land Management
- Census Bureau Maps and Cartographic Resources
- Checklist of Online Vegetation and Plant Distribution Maps
- Color Landform Atlas of the United States
- Current Geographical Publications
- Digital Atlas of New York City
- Digital Chart of the World Data Server (via Penn State University)
- Earth Resources Observation Systems(EROS)
- Ecoregions Data
- ESRI Data and Maps
- FIPS Codes for Counties, by States
- Forest Service maps and brochures
- gCensus Census data is quantified for specific areas displayed by Google maps.
- Geographic Name Information System (GNIS)
- GeoNet Names Server
- Geoscience Information Society (via UC Berkeley)
- Geospatial and Statistical Data Center (U of Virginia)
- GIS in UK (University of Edinburgh)
- Global Land Information System (GLIS)
- GRASS (Geographic Resources Analysis Support System) - via Baylor University
- Harvard Geospatial Library A system for searching and downloading geospatial data.
- Idaho Dept. of Lands GIS Site
- Idaho Digital Line Graph (DLG) Data Files (1:100,000 scale)
- Idaho GAP Analysis Coverages (via U of Idaho Landscape Dynamics Lab) For Idaho, data and maps for land cover, predictions of the distribution of vertebrate species, and documentation of the representation of vertebrate species and land cover types in areas managed for the long-term maintenance of biodiversity
- Idaho Geographic Information Systems GIS data, remote sensing, and interactive maps from the Idaho Department of Water Resources
- Idaho Geological Survey
- Idaho GIS Data (Grouped by County)(via GIS Data Depot)
- Idaho Land Cover Land Use Data Files (1:250,000 scale)
- Idaho National Laboratory (INL) Geospatial Science and Engineering Research Projects include hydropower, stream flow forecasting, microorganisms in Yellowstone National Park, cheatgrass distribution, Alaska North Slope, source water in SE Idaho, and selenium in SE Idaho.
- Idaho Snow Survey Program Idaho mountain snowpack data and streamflow forecasts.
- Idaho Soil Survey Reports Idaho reports consist of maps, text, and tables.
- Infomine Maps & GIS (via University of California, Riverside)
- INSIDE Idaho Idaho statewide geospatial data clearinghouse.
- Internet Geospatial Resources (via Princeton University)
- Map Collections, 1500-
- Map Libraries and Related Organizations
- Mojave (MDEP) Geospatial Data & Links Geospatial natural resource data for the entire Mojave Desert Ecoregion
- Montana State Library Geographic Information System
- National Atlas of the United States
- National Digital Map Library Coverages for 50 of the United States using USGS Digital Line Graph (DLG) data for: State Boundary, County Boundaries, National Parks and Forests, Hydrography, and Major Cities.
- National Forests maps
- National Geodetic Survey
- National Geographic Maps Worldwide maps made for printing and copying
- National Geographic Society Map Machine
- National Geospatial Data Clearinghouse A collection of over 250 spatial data servers,
that have digital geographic data primarily for use in Geographic Information Systems
(GIS), image processing systems, and other modelling software.
- National Geospatial-Intelligence Agency (NGA) US Geological Survey agency that produces topographic maps, publications and digital products from imagery and geospatial data.
- National Ocean Service - Aeronautical and nautical charts
- National Water Information System Surface water, ground water, and water quality data from sites in all 50 States and additional border and territorial sites.
- Natural Resources Conservation Service (formerly Soil Conservation Service)
- Penn State University Libraries Maps and Data Center
- Princeton University Library Geosciences Map Collection
- Profiles of America United States demographic data and graphics by variables of population & migration, age & sex, race & ethnicity, educational attainment, households & families, journey to work, employment & unemployment, income & poverty.
- Society of Cartographers (UK) Education, newsletters, job opportunities, and software for cartography
- Spatial Odyssey; GIS Literature Database (via U of Maine) Access to the tables of contents of many GIS conference proceedings and collections of articles published since 1991.
- St. Charles City County Library District, Missouri, Geographic Information
- State Level Distributors and Clearinghouses for GIS information.
- Topographic Maps Interactive USGS topo maps of the entire United States in various scales
- U S Dept. of Transportation Geographic Information Services
- U S Gazetteer
- UC Berkeley Earth sciences and Map Library
- UC San Diego Maps & Spatial Data Home Page
- University of Connecticut Library Map and Geographic Information Center
- University of Iowa Center for Global & Regional Environmental Research
- University of Oregon Map Library
- University of Texas, Austin, PCL Map Collection
- University of Virginia Geospatial and Statistical Data Center
- USGS Geo Data Online
- USGS Global Land Information System (GLIS)
- USGS Instantaneous Data Archive - IDA Access to U.S. Geological Survey (USGS) historical instantaneous continuous stage, discharge, and other streamflow time-series data on the nations rivers and streams, dating back to around 1990.
- Yahoo! Maps
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