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I have 2 feature class files of contour lines for an area of interest - from 2 different sources. We would like to select just one to use and I'm looking for any methods to effectively compare the files. I'm using ArcGIS as my primary application to run an analysis. Wondering if converting the lines to surfaces and comparing the surfaces is appropriate, or comparing values only along the lines itself? Should I be comparing to a DEM file to see which contour line deviates the most? Thank You.