Aerial Imagery Archive Michigan Department of Department of Natural Resources and Environment. http://www.michigan.gov/dnr/0,1607,7-153-10371_14546---,00.html
Description: This site provides free access to aerial imagery of Michigan that you can view or download to your computer. To view images, you need a special viewer (similar to how you need Adobe Reader to view publications in PDF formats). All images downloaded from this site are in MrSID format, so they are smaller files and load faster.
Airphotos Online Minnesota Department of Natural Resources http://www.dnr.state.mn.us/airphotos/index.html
Description: This Internet service provides direct access to the most recent color infrared aerial photographs taken by Minnesota DNR for forest management. Locate photos of interest by navigating through the photo database. Then you can view, download and order digital and hardcopy airphoto products. Low and medium resolution views can be viewed and downloaded without charge. High-resolution views can be purchased online by credit card and saved in your personal online album.
Forestry’s Aerial Photography Program Wisconsin Department of Natural Resources http://dnr.wi.gov/forestry/airphoto/
Description: It provides instructions on how to view digital orthophotos of Wisconsin forest land on the DNR website and how to order photos from a vendor.
Manuals and Guides for Trail Design, Construction, Maintenance, and Operation, and for Signs U.S. Department of Transportation. Federal Highway Administration http://www.fhwa.dot.gov/environment/rectrails/manuals.htm
Description: It provides Web links to dozens of trail manuals.
Trail Planning, Design and Development Guidelines 2006. Minnesota Department of Natural Resources. 306 p. http://www.comm.media.state.mn.us/bookstore/mnbookstore.asp?page=viewbook&BookID=69276&stocknum=323
Description: This manual contains guidelines for creating both motorized and non-motorized trails. This is a best practices guide for any local, county, regional or state government agency or private organization. It is the most comprehensive trail how-to guide available today.
USGS Store Store.usgs.gov
Description: It offers numerous types of maps, including topographic maps for the United States.
Web Soil Survey USDA. Natural Resources Conservation Service http://websoilsurvey.nrcs.usda.gov/app/
Description: It has maps showing the location of each soil type in the landscape; soil descriptions; use, management and productivity of soils for different agricultural crops, tree species, road construction, etc.; genesis and morphology of soils.
Trail Design for Small Properties (Item #08425) 2006. Baughman, M. and T. Serres. St. Paul, MN: University of Minnesota Extension. 30 p. Available from: http://shop.extension.umn.edu/
Description: This publication is nearly identical to Chapter 13, but the publication also includes drawings and description of many types of trail tools.