Area in S123 and ArcPRO diffrent

[TetianaKoshel]

Hi all!

In the process of testing form we saw that the polygon area  in Survey123, that was count automatically and the polygon area calculated in ArcPro diffrent. 

This diffrence is quite large.

I used one coordinate system. For Sirvey 123 was using formula area(${polygon}).

In ArcPro polygon area was calculating also automatically with using Calculate geometry.

My question is - What algorithm does Survey 123 use to calculate polygon area? And how is it possible to get the same area between s123 and arcPRO?

Will be very gratefull for help!

[MicZatorsky_AEC]

In ArcGIS Pro, which area calculation method did you use?  Planar or Geodesic?

[TetianaKoshel]

I used geodesic method.

[MicZatorsky_AEC]

In Pro, calculate the planar area, and compare Pro's planar and geodesic areas to what S123 returns.  Hopefully, one will match.

You can also get Survey123 to print out the area in a Feature Report as both geodesic and planar  - docs here.