[gdal-dev] hillshading to vector

[Carlo A. Bertelli (Charta s.r.l.)]

Thanks a lot, Roger, it worked like a charm, just fiddling a little with
parameters and than run it in python.
It's really magic, I struggled with this question for two days before
writing to the list.
I think that instead of making another script you could add it as an option
to gdal_contour.py and use it alternatively with -l (default) or -p (output
to polygons).
By the way, another enhancement for gdal_contour could be adding an options
to cut the output with a line or polygon layer (say the shoreline or other
boundary).
c

c
>
> On Wed, Jul 3, 2013 at 8:04 PM, Roger Veciana i Rovira <rveciana at gmail.com
> > wrote:
>
>> Hi, I was just working on that.
>> I think that you need a script like gdal_contour, but creatig polygons
>> instead of lines. The algorithm used is Marching Squares.
>> You can see the code, without explanation, here:
>> https://github.com/rveciana/geoexamples/tree/master/python/raster_isobands
>> In some weeks I'll add some more info in a README file and transform the
>> file into a working script, not just a function. But you can use it just
>> changing the file name and the intervals.
>>
>> Roger
>>
>
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