This map shows Florida in three different projections. We also were to show the slight variations on square mileage calculations in regard to those different projections. There are shifts in size and locations when you compare the three to each other. Depending upon your scale (area of interest), one projection may be chosen over another. In today's software environment, projection decisions are easier but you still need to know what projection all files you are working with are in, the standard projection for the map user, as well as the background of the projection and how they are derived.
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