Knowra Map symbol Map symbol A graphic mark on a map that represents a geographic feature, boundary, route, or other information. Its shape, color, size, and placement encode meaning.
Cartographic semiotics : The study of how maps communicate through signs, symbols, and graphic conventions. It explains how marks acquire geographic meaning rather than merely decorating a map.
Point symbol : A map mark that represents a feature at a location, such as a town, well, or landmark. Point symbols depict features too small or abstract to draw at map scale.
Topographic map : A map that represents terrain and selected natural and human-made features, often with contour lines. Its conventional symbols make roads, waterways, structures, and terrain readable together.
Map projection : A mathematical method for representing Earth's curved surface on a flat map. Projection transforms geographic positions; symbols encode what mapped features mean.
Map legend : A map component that explains the meanings of symbols, colors, and line styles. It decodes symbols whose meanings are not self-evident.
Line symbol : A mapped line whose appearance represents a linear feature, boundary, or route. Line symbols distinguish routes and boundaries through width, pattern, and color.
Thematic map : A map designed to show the spatial distribution of one or more particular subjects. Thematic maps use symbols to express patterns beyond basic geographic reference.
Map label : Text placed on a map to identify geographic features or convey associated information. Labels communicate through written names, while symbols can convey meaning without text.
Visual variables : Graphic properties such as size, shape, hue, value, texture, and orientation that distinguish mapped information. These properties let symbol designs represent different kinds and amounts of information.
Choropleth map : A thematic map that shades geographic areas according to statistical values assigned to them. Its area fills are symbols whose ordered shades encode quantitative differences.
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