On 16/04/2014 14:34, Even Rouault wrote:
Le mercredi 16 avril 2014 12:46:45, Vincent Mora a écrit :
Hi,
I have a vector file with height contours and I need to simplify the
lines (too many points).
Isolevel lines must not intersect, so simplifying the vector directly is
a bit tedious (involves collision detection of lines to constrain
simplification).
If I had the DEM, I could reduce the resolution and use
gdal_countour...but I don't.
So what about generating the DEM from the height contours? Do you think
it fits in gdal somewhere ? Has someone the same kind of use-case ?
It already exists in fact:
- gdal_rasterize : will produce a DEM with the contour line stroked, and with
holes between them
- gdal_fillnodata.py : will fill the holes with interpolated values
Thanks a lot, I found gdal_grid in the meantime which also seems to do
the job but I'm not sure how it samples line, maybe it uses rasterize
internally, I'll have a look.
V.
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