Why Do All Usgs Topographic Maps Use The Same Legend

Universal transverse mercator (utm) (edges of map) prior to 1978, usgs topographic maps used blue tick marks along the edge of the map to illustrate where the utm grid lines were located. Topographic maps represent the locations of geographical features, such as hills and valleys. It provides a complete listing of all the symbols used on the map and the corresponding features they represent.

It provides a complete listing of all the symbols used on the map and the corresponding features they represent. Below are the map characteristics. Department of the interior u.s.

Mapping is a crucial part of earth science.

All topographic maps used the same map legend because this is the most practical way to share symbols and colors. For example, a scale of 1:25,000 means that 1 inch on the map is the equivalent of 25,000 inches—or just under 0.4 miles—in reality. Symbols come in different shapes, sizes and colors to uniquely identify such features on the map. Many of the contour maps we use have been produced by the u.s.g.s.