What is an Interpolater?
Each UTM grid on a 7.5 minute USGS map is 1000 meters square. An Interpolater is an overlay which is used to break each grid down into 100 meter squares. Now that you have 100 meters squares, you can further increase you precision by estimating 10 meter increments in each square.
View and print the Interpolater in PDF format (provided by Steve Bryant). Print it on a transparency then laminate it for strength. This Interpolater should be used with a 7.5 minute (1:24000) map.
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