This is the USGS easy-access (data about data or metadata) site on the
National Geospatial Data Clearinghouse (NGDC) as part of the National Spatial
Data Infrastructure (NSDI). Recommended.
Comprises a merging of the former Defense Mapping Agency, DMA, and the
National Photographic Interpretation Center, NPIC. Reputedly the largest employer
of cartographers in the USA.
NAIS of Canada is the authoritative synthesis of the geography of Canada.
A snazzy, well-designed site of maps, name services, quizzes, and of course
the famous NAISmap (make a map online).
Cool stuff for kids: NAIS
Schoolnet, hot topics, Q & A, an issue mapper, quizzes.
A joint research project of the Departments of Computer Science and Geography
at Virginia Tech. Education modules for introductory geography courses, including
downloadable software.
The premier intellectual endeavor on maps, their historical and social
contexts, and technical processes, resulting in a multi-volume series of the
same name.
At Penn State. The lab supports both Penn State research and teaching,
as well producing educational software, web-based applications and custom
maps beyond the campus.
The University of Minnesota. Contains 280,00 maps, 8,600 atlases, 330,000
aerial photographs (none on the web). Their Automated
Cartographic Information Center provides a free map service to library
patrons.
The University of Georgia. The over 800 rare maps in the library span 500
years, from the sixteenth through the early twentieth century and include
examples of the work of Mercator, Munster, and Blaeu. All are available digitally,
with 20% available at this web site. For example, here is Mercator's
Orbis terrae compendiosa descriptio (1587, 244kb).
The University Library of Berne, Switz. An online map catalog (over 16,000
old maps, plans etc). Also see the homepage of the journal Cartographica
Helvetica, and the homepage of Swiss
map librarians.
Free downloads from over a terabyte of geospatial datasets, a high-powered,
industry-specific search engine, GIS industry news, discussion forums, classifieds,
and software utilities.
GIS-related information and resources and GIS and mapping news provider.
Includes valuable leads to data, utilities, web mapping resources, GIS newsletter,
a GIS discussion forum, classified ads and much more.
The first WWW-based GIS (geographic information system). With NAISMap,
you can view and manipulate National Atlas spatial data layers and construct
your own map of Canada.
A consulting firm specializing in processing, interpretation, and the application
of remote sensing data, techniques and instrumentation to a variety of exploration,
environmental, and engineering projects worldwide.
Specializing in the preservation of satellite imagery archives. Have extensive
experience converting older file formats such as LTWG or MSS to Fast Format.