I'm using ESRI base maps and add local UTM layers in my map app. From I can read, UTM layers would be magically re-projected into ESRI's web mercator. All UTM layers shows ok, but when I use Draw tool to measure the distance between the two borders of a Township, Range and Section(1 mile) I get 1.4miles. Does the distance calculation use a different projection?
Does anyone have some ideas to solve the problem? Please help.
Thanks in advance,