[Qgis-user] Upsampling TIN

[Nicolas Cadieux]

Hi,

You cannot invent new data between point without doing an interpolation. Your choice of interpolation will determine the quality of this data.  The only way I can think of is to create a raster from this TIN.  Then, resample (re-interpolated) this raster with a finer pixel and then make a new TIN.  This may create a finer TIN but this will significantly alter the original data.  You would need to evaluate the results and keep a backup of the old files.

Alternative, I would try with Mesh Lab.  It’s open source and probably has Mesh densification methods that would be more adapted.  Cloud Compare also has interesting algorithms. 
Nicolas

> Le 4 oct. 2019 à 03:40, joolek <joolek.o at gmail.com> a écrit :
> 
> Hi Experts, 
> 
> I've tried so many software's without success.
> Is it possible to upsample existing TIN? What I mean is for example divide each triangle into two for example. Not interpolation but somehow... subdivide or add more vertices between existing one?
> Thank you for all your time
> J
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