map is a representation of the Earth, or part of it. The distinctive character-istic of a topographic map is that the shape of the Earth’s surface is shown by contour lines. Contours are imag-inary lines that join points of equal elevation on the surface of the land above or below a reference surface, such as mean sea level.

Interpreting the colored lines, areas, and other symbols is the first step in using topographic maps. Features are shown as points, lines, or areas, depending on their size and extent. For example, individual houses may be shown as small black squares.

A map symbol or cartographic symbol is a graphical device used to visually represent a real-world feature on a map, working in the same fashion as other forms of symbols.

2022年6月28日 · This simple map reading guide explains every map symbol on an OS Explorer map (1: 25 000 scale), most popular for walking and cycling. Learn what each map symbol represents on the ground and how you can find points of interest, access land and public rights of way to make the most of your time outside.

2019年5月7日 · In a map, the objects are shown by symbols or signs, not by names. Following are the 42 types of map symbols that are used for civil engineering surveying and levelling.

2023年9月16日 · Map symbols are the visual tools used in cartography to represent real-world features on a map. These symbols, ranging from simple dots to intricate icons, serve as a bridge between the physical world and its graphical representation.

1 天前 · A map symbol guide in a Portable Document Format (PDF) for the 25K Recreational OnDemand Topo map product available through the topoBuilder application displaying the symbology for point, line, polygon features and raster imagery.

2025年1月24日 · Map symbols are arbitrary or conventional signs used to represent operations, quantities, elements, relations, or qualities pertaining to a specific field. In the context of maps, these symbols are used to represent physical features such …

In GIS, we use map symbology to depict features on a map. We can break vector symbols into points, lines, and polygons. We can have color ramps for continuous and discrete data for raster symbols. Finally, 3D symbols add depth and dimension with their own map symbols. Below are some examples of map symbols.

The set of symbols and their appropriate use on National Topographic System (NTS) maps is described by a specific set of rules: Standards and Specifications for Polychrome Maps. This guide ensures uniform depiction of land features on both 1/50 000 and 1/250 000 maps.