Acreage calculation is off

Discussion created by stevemazak on Jun 24, 2014
Latest reply on Jun 25, 2014 by smazak
I am trying to calculate the acreage in a polygon and the numbers I keep getting are 1/3 to 1/2 higher than they should be when calcalculating the area of a known polygon.  Why do I keep getting higher readings?  I am using OSIP tile data provided by the State of Ohio.