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WGS84 geoidal separation file

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12-13-2023 05:18 AM
RoxFra
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I am using the Converting from orthometric to ellipsoidal heights workflow in ArcGIS Pro 3.2 to convert a DEM provided relative to the WGS84 ellipsoid into geoidal heights. Therefore I am using the equation as follows:

H = h - N

, where

  • h = ellipsoidal height (current DEM)
  • H = orthometric (geoid) height (target DEM)
  • N = geoidal separation

The workflow specifies to use the file \Pro\Resources\pedata\geoid\WGS84.img as N.

My question is: what geoid model is used in this file? I read a post from 2017 that mentionned EGM96. Has it been updated to EGM2008 in newer ArcGIS Pro versions?

Thank you!

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