They are usually used for maps of the entire world. Three maps, drawn with examples of conformal, equal area, and equidistant projections, overlaid with geodesic circles that demonstrate geometric distortions.Ĭompromise projections provide a representation of the earth that is not perfectly correct in any way but not badly distorted in any way either. Equidistant projections preserve distances, although only from certain points or along certain lines on the map. Equal area projections preserve area, at the expense of angles, so the shapes of some places appear skewed. But the cost of this quality is the distortion of areas and distances. Projection typesĬonformal projections preserve angles locally, so the shapes of features appear true. Each one seeks to preserve some geometric property at the expense of others. All projections distort the earth in some way. You will not find a projection that is suitable for all maps.
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