Learning GIS

• A USGS GIS primer A decent place to start.
• GIS Dictionary from the University of Edinburgh Geography Dept.
• Frequently asked Questions from the GIS-L and comp.info.systems.gis news groups.

GIS Publications

• GIS World
• GeoInfo Systems

GIS Software Companies

• Environmental Research Systems Incorporated
• MapInfo Incorporated
• ThinkSpace Inc
• Multispec
• Erdas
• Intergraph
• Tydac Technologies
• EPPL7
• Oliver Weatherbee's Annotated Bibliography of GIS Software -- Quite deep!.

GIS Data Sources

• Massachusetss Geographic Information System (A divisiom of the Department of Environmental Protection.)
• The EROS Data Center The clearinghouse for USGS digital data. Many resources available over the net for free!
• U.S.D.A. Natural Resource Conservation Service Data Center Lots of intertesting natural resources data.
• Digital Elevation Data CatalogBy Bruce Gittings of the University of Edinburgh. Actually you have to first go through the Edinburgh University GIS Home page which itself is quite interesting!
• A list of on-line resources for Earth Scientists By Bill Thoen.
• NOAANational Geophysical Data Center.
• Manual of federal geographic data products.
• U.S. Census
• National Wetlands Inventory

Handy GIS Data Utilities

• Lots of shareware conversion utilities from the Bureau of Land Management
• Some scripts from ESRI.
• MapInfo scripts.

GIS Research and Applications

• The U.S. Geological Survey Home page.
• Federal Geographic Data Comittee Plans for a National Spatial Data Infrastructure
• The Harvard GSD / Biodiversity Research Consortium Camp Pendleton Study.
• The National Center for geographic Information and Analysis (USA)
• U.S. Fish and Wildlife Service

Other GIS Subject Meta-Indexes

• A GIS Gateway from the U.S. Census.
• The folks at ERIN bring us their list of GIS WWW sites.
• A meta index from the Institute of Biogeography at the University of Karlsruhe.
• A meta index from the USGS.
• A meta index from the EPA.
• Oliver Weatherbee's Home Page -- Quite deep!.