I can check ‘Latitude’ and ‘Longitude’ of imported Google Earth Terrain model by geolocation information dialog. It shows X-Y-Z axis origin (0, 0, 0), but how can I check the ‘Altitude’ of this point ?
Do I have to export KMZ file and check the kml file contents?
To get the elevation [altitude] of a fixed point in Google Earth first make a short path - say 1m long, drawn at some memorable Lat/Long on the area in question: using Add > Path… - set its Altitude == Clamped to Ground
Set the Measurement units == say meters…
Then use Edit > Show Elevation Profile
A graphical representation of the path appears along the bottom of the view.
The start of the path is given in the units - say meters…
That is the elevation [altitude] of that first Lat/Long point.
Since the whole mesh is setup relatively, you can then use that particular elevation to move the mesh upwards, or more sensibly setup a Z ‘datum’ from that when it is actually == 0…
[See this tool, which might help once you have the ‘datum’ resolved… http://sketchucation.com/pluginstore?pln=coordstexttagtoolfromdatum ]