I've read a little about Planar vs Geodesic measurements on the web, but am still a little confused. Here's a couple questions that might help me wrap my head around it.
Which is better to use to report area/line lengths? I'm working in western North Carolina in ArcGIS Pro using NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet. I notice using the "Measure Features" tool that the area differences (between Geodesic and Planar) are nearly non-existent over small areas, but 4 acres different over a 20,000 acre area.
Why does the "Calculate Geometry" tool not have a planar area measurement option? But does offer two perimeter length measurement options?
Does the "Measure Features" tool default to the coordinate system of the map? I had a map that was in WGS84, and was getting some seemingly very wrong answers, presumably because it was unable to calculate area in the Geographic Coordinate system?
Thanks for the help!