Tuesday, May 10, 2011

Conformal, Equal-Area, and Equidistant Map Projections



     A certain map is used depending on its purpose. The most common categories for these projections are conformal, equal-area, and equidistant. The above maps show these different map perspectives.
     The first map set I created is an example of conformal maps. Conformal maps are used when the purpose is to represent angles and distribution from a local area. In other words, each parallel must cross each meridian at a right angle. Of the many conformal projections, the transverse and vertical mercators are seen most often. Transverse mercators is used to measure and analyze areas from East to West. Vertical mercator projections are used for North to South.
     Another map set I used is the equal-area map projection. These maps are used for getting a general feel of proportion for an area because this map preserves area consistently. The equidistant map projection and the equal-area map projection sound like they represent the same purpose, however they are different. The equidistant map projection is used to measure distance from a point or multiple points outward. This is not used for general proportions or areas like equal-area but rather used for more specific measurements for one point or between multiple designated points.
     Each map projection can be used in its best way as long as the cartographer knows the purpose of the map and what is desired.

1 comment:

  1. Nice job, but you're missing the distances between Washington DC and Kabul for each projection.

    8.5/10

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