[Therion] 3D model height

[Benedikt Hallinger]

Hi there,
if you measure the altitude with a barometric device, you do not get the 
altitude above the ellipsoid. You have to account for that at the input 
of your data.

With the "cs" command you define your input data to be in a specific 
coordinate system, and also your altitude has to be given in that 
system. If you just put the barometric altitude there (which you usually 
did calibrate to a map, didn't you?) you have to transform the altitude 
manually if the reference altitude differs.



Am 2021-02-19 8:44, schrieb Balambér Hakapesz:
> Hi!
> 
> When generating 3D models, Proj4 transforms between different
> coordinate systems.
> This also transforms the ellipsoidal altitude, but the data always
> refer to altitude above sea level and should not be changed.
> The finished models do not fit the topography, you have to cheat with
> the height to be good.
> 
> Balázs Holl.
> 
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