Of course, the advantage of the TNM viewer is that you can preview the USGS Topo Map before you download it. Unless you want topo maps in Alaska, they are based on 1:100,000 and 1:24,000 scales. How to Download Historical USGS Topographic Maps with TopoView One of the neatest things ...
The U.S. Geological Survey (USGS) produced its first topographic map in 1879, and it still produces them today. Developments in aerial photography and satellite imaging make these maps much more accurate and efficient to produce than in the days when they were created by hand. When the U...
The USGS has been the definitive source for U.S. topo maps since the 1880s. Often referred to as quadrangle maps, or quads, the most commonly used USGS topo maps have a scale of 1:24,000 and cover 7.5 minutes of longitude by 7.5 minutes of latitude. In apps and on the Internet, t...
USGS Maps The U.S. Geological Survey (USGS) used to be the gold standard for topo maps. Covering the entire country, its maps consisted of rectangular areas of land called quadrangles ("quads" for short). Once available in most REI stores and other outdoor shops, preprinted USGS maps are...
I know that topographic maps and non-digital navigation can be intimidating, especially for those who never used them.
Let’s look up a national landmark in Google Maps. National landmarks are marked on USGS maps, so you get an idea of how accurate your grid navigation skills are. We’ll use the White House as an example. VisitGoogle Mapson a desktop web browser. In the search field, type White Hou...
According to the dictionary, a map scale is defined as "a ratio which compares a measurement on a map to the actual distance between locations identified on the map." Since it would be virtually impossible to create a life-size map, maps are scaled-down
The most commonly used outdoor topographical maps, provided by the USGS, are the 7.5 minute maps. Note: a minute is one 60th of a degree, and not a measure of time. 7.5 Minute refers to the fact the map covers an area 7 minutes and 30 seconds of longitude by 7 minutes and 30 seco...
Longitude and latitude are tools that pinpoint any location on Earth. With the dawn of GPS systems and smartphone maps, it's not as common to map out locations using long numerical coordinates. But the latitude and longitude system is the basis of many of those mapping apps, and an underst...
Even my trick of renaming the files may have just caused the unit to load the maps in a different order, finally picking up motopo11 before trying to load those old maps; and thus having it "work" partially - just missing some of the old Legend topo maps. Makes complete sense to me...