[Gdal-dev] gdal_contour

[Frank Warmerdam]

On Sun, 13 Feb 2005 18:43:04 -0600, Simpson <asimpson at i-55.com> wrote:
> 
> repost with corrected 'Subject'...
> 
> Greetings,
> 
> Is there a commandline utility that will vectorize a raster and will follow
> the outside edges of the pixels, rather than the center of each pixel as
> gdal_contour does?

Drew, 

I am not familiar with such a tool within or built on the GDAL library.

Are you wanting something suitable to create a polygon layer from
a classification result?  That is producing a polygon around each 
connected group of pixels with exactly the same values?  Or 
something like contours which generates edge vectors between 
pixels at various breakpoints? 

Best regards,
-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent