Geology Maps, Nautical Charts, Topo Maps on the Web
Colorado School of Mines
LibGuide of hyperlinks to geology map and GIS websites compiled by the Aruther Lakes Library.
National Geologic Map Database
View USGS geology and topography maps of the 50 states.
The Geologic Atlas of the United States - Texas A&M University
The Geologic Atlas of the United States is a set of 227 folios published by the U.S. Geological Survey between 1894 and 1945. Each folio includes both topographic and geologic maps for each quad represented in that folio, as well as description of the basic and economic geology of the area.
British Geological Survey Maps Portal
This resource provides high resolution viewing images of almost all small and medium scale maps produced by the British Geological Survey since mapping start in 1832.
Office of Coast Survey
View and dowload current NOAA coast charts.
Office of Coast Survey, Historical Charts
The Office of Coast Survey's Historical Map & Chart Collection is a rich archive of high-resolution images capturing a vast wealth of the U.S. government's historical surveying and mapping. The collection of over 35,000 scanned images - covering offshore and onshore sites - includes some of the Nation's earliest nautical charts, bathymetric maps, city plans, and Civil War battlefield maps.
Burea of Land Management
Visit region specific pages for planning and project maps, recreation maps and more.
USGS Map Locator & Downloader
Use the locator to find the 7.5, 15 and or 30 minute US topographic map you need.
USGS National Map Viewer
Create and share overlay maps using current or historic topos with hydrographic, GNIS, Natural Structures datasets, etc.
USGS 7.5 minute quads PDF downloads - National Geographic Society
National Geographic has built an easy to use web interface that allows anyone to quickly find any 7.5 minute topo in the continental U.S.A. for downloading and printing. Each topo has been pre-processed to print on a standard home, letter size printer..
Create and share maps - add lines, polygons, markers, etc. with layer options including 7.5' topo maps, Forest Service, and satellite photos.
United Nations Environmental Protection
The UNEP/GRID-Arendal Maps & Graphics Library is an on-going project to collect and catalogue all graphic products that have been prepared for publications and web-sites from the last 15 years in a wide range of themes related to environment and sustainable development.
The Atlas of Canada
Topographic maps from all of Canada's provinces and territories.