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This is a tutorial for creating interactive maps on Wikipedia for shapes using OpenStreetMap data, available on a compatible Open Database License.This is applicable for creating maps of neighborhoods, parks, historic districts, campuses, and most other present-day sites.
Some maps, called cartograms, have the scale deliberately distorted to reflect information other than land area or distance. For example, this map (at the left) of Europe has been distorted to show population distribution, while the rough shape of the continent is still discernible.
In dynamic media, shapes of familiar coastlines and boundaries can be dragged across an interactive map to show how the projection distorts sizes and shapes according to position on the map. [ 16 ] Another way to visualize local distortion is through grayscale or color gradations whose shade represents the magnitude of the angular deformation ...
The various features shown on the map are represented by conventional signs or symbols. For example, colors can be used to indicate a classification of roads. These signs are usually explained in the margin of the map, or on a separately published characteristic sheet. [17] Topographic maps are also commonly called contour maps or topo maps.
Gott, Goldberg and Vanderbei’s double-sided disk map was designed to minimize all six types of map distortions. Not properly "a" map projection because it is on two surfaces instead of one, it consists of two hemispheric equidistant azimuthal projections back-to-back. [5] [6] [7] 1879 Peirce quincuncial: Other Conformal Charles Sanders Peirce
The projection found on these maps, dating to 1511, was stated by John Snyder in 1987 to be the same projection as Mercator's. [7] However, given the geometry of a sundial, these maps may well have been based on the similar central cylindrical projection, a limiting case of the gnomonic projection, which is the basis for a sundial. Snyder ...
Maps were produced extensively by ancient Babylon, Greece, Rome, China, and India. The earliest maps ignored the curvature of Earth's surface, both because the shape of the Earth was uncertain and because the curvature is not important across the small areas being mapped.
A shape is a graphical representation of an object's form or its external boundary, outline, or external surface. It is distinct from other object properties, such as color, texture, or material type. In geometry, shape excludes information about the object's location, scale, orientation and reflection. [1]