The National Atlas of the United States displays several hundred layers of GIS data for the United States. The data is organized into the following categories.
Agriculture (Information about Farms, Livestock, and Crops) Environment (Information about hazardous sites) People (Information about crime rates, economy, food stamps, jobs, mortality rates, population density, etc.) Biology (Information . . . → Read More: United States National Atlas
The Geologic Map of North America was published in 2005 by John C. Reed, Jr. (USGS), John O. Wheeler (Geological Survey of Canada), and Brian E. Tucholke (Woods Hole Oceanographic Institution). This is an amazing piece of work that covers the entire continent of North America at a scale of 1:5,000,000. The map . . . → Read More: Geologic Map of North America
This Geologic map of Oregon consists of semi-transparent colored polygons that cover the entire state.
Click on a colored area to get the applicable geologic unit symbol. Then open up the Legend to look up the symbol and the characteristics of that geologic unit.
Google Earth Library
. . . → Read More: Geologic Map of Oregon
The European Digital Archive on Soil Maps of the World (EuDASM) is a massive repository of scanned soil and geologic maps covering large areas of Africa, Asia, Canada, Caribbean Islands, Europe, Latin America, and the United States. The maps were archived over the years by ISRIC – World Soil Information and were recently been . . . → Read More: European Digital Archive on Soil Maps of the World
This collection contains 28 1×2 degree geologic maps covering the entire state of California.
The 1:250,000 scale maps were produced in the 1960s and 1970s by the USGS and State of California Division of Mines and Geology.
Google Earth Library
California Geological Survey
. . . → Read More: California Geologic Maps
Highly detailed digital geologic maps of the US states (not including Alaska and Hawaii) with consistent descriptions (lithology, age, etc) from state to state. The original geologic data was from various sources and compiled by the USGS into KML format.
Click on a polygon to bring up information about that geologic unit. From . . . → Read More: State Geologic Maps Compilation