Topographic map

A map indicating surface elevation and slope. U.S. Geological Survey quadrangle series maps showing the shape of the earth's surface by contours. They also show control data, boundaries, roads, buildings, watercourses, lakes and reservoirs, and other land features. The 7.5-minute series is appropriate for doing inundation mapping.

1. A map containing contours indicating lines of equal surface elevation (relief), often referred to as topo maps.
2. Often used to refer to a map sheet published by the U.S. Geological Survey in the 7.5-minute quadrangle series or the 15-minute quadrangle series.