[Gdal-dev] Vectorizing rasters

[a.francos at cgsondeos.com]

Hi Guillaume

Thanks for your quick answer.

As a matter of fact gdal_contour works rather well sometimes, just
selecting adequately the "dummy elevations", but producing afterwards line
entities instead of polygons, as far as I know.

Certainly, I do not know how to transform closed lines into polygons by
using GDAL or related libraries.

I will inform the list If I manage to find out!

Cheers

Antonio.


>> -----Message d'origine-----
>> De : gdal-dev-bounces at lists.maptools.org
>> [mailto:gdal-dev-bounces at lists.maptools.org] De la part de
>> a.francos at cgsondeos.com
>> Envoyé : vendredi 28 avril 2006 09:17
>> À : gdal-dev at lists.maptools.org
>> Objet : [Gdal-dev] Vectorizing rasters
>>
>>
>> Hi there
>>
>> I am just looking for tools (or algorithms that I might
>> implement) in order to vectorize rasters (e.g. convert to
>> polygons -SHP?- the discrete features included in an, let's
>> say, ASCII raster map).
>>
>> Up to now the only ways to do so require the use of
>> commercial packages.
>>
>> Thank you so much. Cheers
>>
>> Antonio.
>
> Hi,
>
> I'm not sure but gdal_contour (http://www.gdal.org/gdal_contour.html)
> might
> bring you an answer. Since it compute vector contour of rasters, just
> imagine each discrete value of pixel is a different elevation.
>
> A+,
> Guillaume.
>
>
>
> --
> This message was scanned for spam and viruses by BitDefender.
> For more information please visit http://linux.bitdefender.com/
>
>
>




-- 
This message was scanned for spam and viruses by BitDefender.
For more information please visit http://linux.bitdefender.com/