Survey Data Projection Map

[jStrada]

What is the projection coordination system that is being used in Archicad 27. Trying to understand the backend to the Real World Coordinates. For example: https://epsg.io/32129.

 

[jStrada]

For reference, I'm testing this method: https://asiabim.wordpress.com/2016/03/15/creating-topography-in-archicad-from-autocad-survey-data/