This site, produced by the United States Geological Survey, is all about aquifers. Many different types of aquifers are addressed, these include: sand and gravel, sandstone, sandstone and carbonate, carbonate-rock, and...

Based at the University of California, Berkeley, the Electronic Cultural Atlas Initiative (ECAI) is a "global consortium of people who share the vision of creating a distributed virtual library of cultural information...

The Federal Geographic Data Committee (FGDC) is an interagency committee organized in 1990 to promote the coordinated dissemination and application of geospatial data through development of the National Spatial Data...

This tutorial introduces students to the concept of navigating with a topographic map and compass. Topics include the features and symbols used on U. S. Geological Survey (USGS) maps, the use of scale to represent...

The Fundamentals of Physical Geography website is designed to be a free online textbook for University and College students studying introductory Physical Geography. Version 1.0 of Fundamentals of Physical Geography...