Shape area in not adding up

by BettaFische   Last Updated July 11, 2019 23:22 PM - source

So I'm trying to get the area of a buffer zone with a 50 meter buffer zone in ArcMap 10.6.1. Ideally, this would be 7853.98 meters, but when I check the Shape_Area (by using Project to change the coordinates from WGS 1984 to WGS 1984 Canada Atlas), the area is 8804.219131 meters instead. That's a pretty big difference. I checked and both coordinate systems both use meters as the base unit. What else could be wrong?

Note: The buffer zone is a small part of a process where I'm creating shapefiles from select portions of the buffer. For some reason I can't edit features created using a PCS instead a GCS, so that's why I'm having to convert coordinate systems.

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