Acreage calculation is off

06-24-2014 03:34 PM
New Contributor
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.
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2 Replies
MVP Emeritus
Are the polygon and the raster in the same projection?  How is acreage being calculated in both?
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New Contributor
Thanks Dan.  You were right.  The projection was not the same.  Once I was able to get all the layers on the same projection, the
acreage calculation was spot on.  Thanks for the help, Dan, I really appreciate it.
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