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Tactile map variables: Just as Jacques Bertin retinal variables help determine how visual maps are produced; tactile maps have a formula as well. Although researchers have not standardized tactile map variables, these nine are usually included depending on the substrate : vibration, flutter, pressure, temperature, size, shape, texture/grain ...
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Joshua A. Miele (born 1969) is an American research scientist who specializes in accessible technology design. Miele conducted research on tactile graphics and auditory displays at the Smith-Kettlewell Eye Research Institute in California for fifteen years.
A world map is a map of most or all of the surface of Earth. World maps, because of their scale, must deal with the problem of projection. Maps rendered in two dimensions by necessity distort the display of the three-dimensional surface of the Earth. While this is true of any map, these distortions reach extremes in a world map.
This image is a map derived from a United Nations map. Unless stated otherwise, UN maps are to be considered in the public domain. This applies worldwide. Some UN maps have special copyrights, as indicated on the map itself. UN maps are, in principle, open source material and you can use them in your work or for making your own map.
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feature: which geographic objects should be displayed (corresponds in the map data to the name of the field under the objects field). The default is value countries. ids of geographic entities: The actual parameter names depend on the base map and the selected feature. For example, for the above mentioned world map the ids are ISO country codes.