[Qgis-user] How to smooth a TIN ?

[Andreas Neumann]

I agree - I once did a shaded relief of the Kilimanjaro with v.surf.rst 
for calculating a DEM from contour lines and elevation points.

The results where much better than with TIN or ESRIs topogrid module. It 
was only a bit tricky because of the longer computing times and memory 
management.

If you want really good results I recommend looking into v.surf.rst.

Andreas

On 3/24/10 9:05 AM, Marco Hugentobler wrote:
> Hi Jeremy
>
> You might try a different interpolation then. In the interpolation plugin, you
> could use inverse distance weighting. In GRASS, there is v.surf.rst which I
> think is a good choice for smooth surfaces.
>
> Regards,
> Marco
>
> Am Dienstag, 23. März 2010 15.29:36 schrieb Jeremy G:
>    
>> Hi,
>>
>> Starting with a point vector shapefile, I did a TIN interpolation with the
>> QGIS plugin. If I try to shade it as it is, the result is full of
>> irregularities (1). Is there a method to smooth the result ?
>>
>> Thanks !
>>
>> Jeremy
>>
>> (1) : http://www.geographiques.org/img/qgis_dem.png
>>
>>      
>