Usgs topographic map symbols. Symbols are used in topographic maps to identify cultural and natural features. Topographic map legend and symbols. Since a map is a reduced representation of the real world map symbols are used to represent real objects. The distinctive character istic of a topographic map is that the.
Features are shown as points lines or areas depending on their size and extent. Without symbols we wouldnt have maps. The topographic maps on topozone were created by the united states geological survey usgs and have evolved for more than a century. What is a topographic map.
A map is a representation of the earth or part of it. A topographic map is a two dimensional representation of a three dimensional land surface. Free topographic maps online 247. Topographic maps are differentiated from other maps in that they show both the horizontal and vertical positions of the terrain.
Interpreting the colored lines areas and other symbols is the first step in using topographic maps. Cartographic symbology the atlas of canada maps are complex tools for visualizing and communicating scaled down geospatial data and graphic symbology is their language of communication. The pubs warehouse provides access to over 150000 publications written by usgs scientists over the century plus history of the bureau. Symbols come in different shapes sizes and colors to uniquely identify such features on the map.
Topographic map symbols and legend map symbols.