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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Original file (6,600 × 3,600 pixels, file size: 3.64 MB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
An approximation of the AuthaGraph projection. AuthaGraph is an approximately equal-area world map projection invented by Japanese architect Hajime Narukawa [1] in 1999. [2] The map is made by equally dividing a spherical surface into 96 triangles, transferring it to a tetrahedron while maintaining area proportions, and unfolding it in the form of a rectangle: it is a polyhedral map projection.
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 ...
This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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.
Data includes many USGS DRG maps, TIGER/Map data, and boundary maps. (Also available at Internet Archive USGS Maps) DEMIS World Map Server generates maps using public domain data with no usage restrictions; Geospatial One-Stop geodata.gov; Soviet Military Maps all in the Public Domain. One of them can be seen here.
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.