[gdal-dev] Gdal_grid with a mask layer?

[Joaquim Luis]

Jukka, if no gdal solution comes out, consider this

http://gmt.soest.hawaii.edu/doc/latest/grdmask.html

Joaquim

>
> Hi,
>
>
> I have depth data from a lake as scattered points and I would like to  
> convert them into raster DEM.  Unfortunately this lake is not a  
> >rectangular, north oriented one but it has a curvy shoreline and lots  
> of islands. In my first trials the resulting DEM leaks away from the  
> >water to the dry ground. I guess that some other algorithms than the  
> invdist would give better results near the shoreline. Generating >fake  
> zero depth points on the ground area would probably help with all the  
> algorithms. However, what I would like to do is to define >a mask layer  
> for telling the valid area for the DEM that will be generated.  Is that  
> possible somehow? If it is not then other good tricks >are welcome. The  
> good result should have zero depth on the ground and sharp shoreline at  
> correct place.
>
>
> -Jukka Rahkonen-
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