This link takes you to map sites on these topics: Community, Environmental, Health, Historical, Space, United States, Weather, World, and Where to Buy U.S. Government Maps.
The most frequently asked questions I receive when helping people include, but are not limited to:
How do I find USGS Topographic Maps online? How do I view changes in the landscape through time by using the USGS Topographic Maps? Is there a way to markup a map for hiking or presentation purposes? My searches are not working. Do I have the correct name?
CIESIN works at the intersection of the social, natural, & information sciences, & specializes in on-line data & information management, spatial data integration and training, and interdisciplinary research related to human interactions in the environment
Provides access to many GIS conference proceedings and collections of articles published since 1991. Information on how to access the table of contents of GIS journals or search for journal citations and abstracts is also available at this site.
The MABLE/Geocorr geographic correspondence engine generates files and/or reports showing the relationships between a wide variety of geographic coverages for the United States.
The Geospatial Data Clearinghouse is 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.
Socioeconomic Data and Applications Center. SEDAC’s mission is to develop & operate applications that support the integration of socioeconomic and earth science data and to serve as an “information gateway” between the earth sciences and social scie
The TerraServer-USA Web site is one of the world's largest online databases, providing free public access to a vast data store of maps and aerial photographs of the United States.
