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Map coloring : ウィキペディア英語版
Map coloring
Map coloring is the act of assigning different colors to different features on a map. There are two very different uses of this term. The first is in cartography, choosing the colors to be used when producing a map. The second is in mathematics, where the problem is to determine the minimum number of colors needed to color a map so that no two adjacent features have the same color.
==Cartography==

Color is a very useful attribute to depict different features on a map.〔(【引用サイトリンク】title=Map Colors - The Role of Colors on Maps )〕 Typical uses of color include displaying different political divisions, different elevations, or different kinds of roads. A choropleth map is a thematic map in which areas are colored differently to show the measurement of a statistical variable being displayed on the map. The choropleth map provides an easy way to visualize how a measurement varies across a geographic area or it shows the level of variability within a region.
Displaying the data in different hues can greatly affect the understanding or feel of the map. Also, the cartographer must take into account that many people have impaired color vision, and use colors that are easily distinguishable by these readers.
Colors can also be used to produce three-dimensional effects from two-dimensional maps, either by explicit color-coding of the two images intended for different eyes, or by using the characteristics of the human visual system to make the map look three-dimensional.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Map coloring」の詳細全文を読む



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