?? a point in between what? A TIN is a set of triangles, where each corner 
represents an X,Y,Z point in space (on a surface usually). So where do you nwat 
to have and extra vertex...? Sounds like you are not wanting aq TIN in the end, 
but something else...

Barend

On 04/10/2019, 10:47, "joolek" <[email protected]<mailto:[email protected]>> 
wrote:

Hi,
I am more interested to have a point in between rather than the triangles, 
basically interpolate the data twice, to have an extra vertex between the 
existing one.
J

On Fri, 4 Oct 2019 at 09:23, Luigi Pirelli 
<[email protected]<mailto:[email protected]>> wrote:
IMHO tension surface simulation for example can be an application where a TIN 
up sample could be necessary

Luigi Pirelli

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On Fri, 4 Oct 2019 at 10:14, 
[email protected]<mailto:[email protected]> 
<[email protected]<mailto:[email protected]>> wrote:
The main question is actually: why would you want to do that? You just end up 
with a larger data structure (more triangles) to show exactly the same surface 
model. You would not have any more detail, i.e the smaller triangles inside the 
original large one would have exactly the same azimuth and slope and therefore 
add no terrain detail...

yours,

--
Barend Köbben



On 04/10/2019, 09:41, "Qgis-user on behalf of joolek" 
<[email protected]<mailto:[email protected]> on 
behalf of [email protected]<mailto:[email protected]>> wrote:

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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