Good evening, I have been delivered polygon data in 2 different projected coordinate systems. I've noticed some errors which I assumed to be due to using different projections, so I have been re-projecting everything to be standard. I would have chosen neither, but it is what it is.
In the attached file, there is a small area shown, in two different projections as follows:
Rose: WGS_1984_Web_Mercator_Auxiliary_Sphere, 1.42 Acres.
Hatched: NAD_1983_HARN_StatePlane_Oregon_North_FIPS_3601_Feet_Intl, 0.7 Acres.
The difference in acres calculation is DOUBLE but as you can see the area on the "ground" is definitely nowhere near double. I believe that the NAD83 value is more accurate.
Can someone help me explain this and a solution to it? Thanks very much, in advance.