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The legend of the map also contains important information and all of the thematic symbols of the map. Symbols that need no explanations, or do not coincide with the theme of the map, are normally omitted from the map legend. Thematic symbols directly represent the maps theme and should stand out. [17]
Templates for producing legends for charts, maps, etc. The pages listed in this category are meant to be function templates , i.e. templates that produce text, images or other elements . This page is part of Wikipedia's administration and not part of the encyclopedia.
Based on simplified Location maps. A province in the country (when the blank map is actually filled). /Area maps (en) Maps that highlight one subject area, primarily for species distributions. Locator maps: a country (red) in its region and in the world (corner map). Multi-area: ranges of animals species, languages. /Gradient maps
Another example of early thematic mapping comes from London physician John Snow. Though disease had been mapped thematically, Snow's cholera map in 1854 is the best-known example of using thematic maps for analysis. Essentially, his technique and methodology anticipated the principles of a geographic information system .
For readers: When self-defined legend is provided in the map, it takes precedence over this one. For editors: Wikipedia:Route diagram template
For maps of future elections, "hold" is used for "incumbent intent is known and is eligible, or incumbent is running for re-election", whereas "gain" is used for "incumbent is retiring/term-limited". Following this, there is an additional color used, which is also used when an election has taken place but not been called yet.
This map of the 2004–2016 U.S. presidential elections uses county districts, a spatially intensive variable (difference in proportion) that is unclassed, and a spectral divergent color progression. Note the continuous gradient legend that reflects the lack of classification. Every choropleth map has a strategy for mapping values to colors.
The various features shown on a map are represented by conventional signs or symbols. For example, colors can be used to indicate a classification of roads. Those signs are usually explained in a map legend on the margin of the map, or on a separately published characteristic sheet. [6]