EPA On-line Tools for Site Assessment Calculation
Gradient and Map Scaling
The "gradient scaled from a map" calculator is designed to be used with
maps that have been reduced from their original scales, so that an
odd number of measurement units (say inches) corresponds to
a map unit (i.e., 100 ft).
In the following example the map scale has been printed such
that 1 3/8 inches is equal to 100 ft.
Thus a distance measured across the map of 20 7/8 inches
is determined by the calculator to equal 1520 ft.
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