The Equidistant projections above are desingned to preserve distance accurately. Therefore, the maps should have similar distances from Washington, D.C. to Kabul. However, there is a 3,000 mile difference. The Equidistant Conic map is an example of a solid Equidistant projection, but the Plate Carree map does not exactly do what the map is intended for. Because the parcels are all the same size, distances that are not directly near the equator are slightly off. This is why the Plate Carree's distance from Washington to Kabul varies from the Equidistant Conics distance.
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