[gdal-dev] gdal_polygonize and polygon edges

[Mateusz Loskot]

On 20 February 2013 15:08, Jeff Lacoste <jefflacostegdal at gmail.com> wrote:
> Thanks every one who responded to my post.
>
> Jeff: it appears that your approach involve smoothing the original grid
> before generating contours (or polygons from it). Right ? It would be nice
> if I could have the smoothing either as an after process operation or
> ideally as an option within the polygons generation process itself.
>
> Daniel: Using 'SIA' technique sounds promising. Does it apply to polygons as
> well ? or just polylines ? I would be interested to test (and later use if
> applicable) your approach.
> If would like an extra tester, please let me know.
>
> Graeme: Is your tracing technique a new algorithm different from
> GDAL_Polygonize ? Is there a C/C++ code I can build or may be an .exe
> utility I could use to try out ?
>
> p.s: i did not have a chance to try out ''Ramer-Douglas–Peucker' yet.


If you're after C++ code, check this:

http://psimpl.sourceforge.net/

It shouldn't be a problem to stream OGR geometries through one of
these algorithms.

Best regards,
--
Mateusz Loskot, http://mateusz.loskot.net