[Gdal-dev] gdal_contour

[Simpson]

Frank,

Yes, I am looking for a classification vectorizer.  gdal_contour does an
excellent job and is very fast, but I realize it wasn't designed for this.
I have to buffer the results by half a pixel.

Thanks,
Drew.

-----Original Message-----
From: Frank Warmerdam [mailto:fwarmerdam at gmail.com]
Sent: Sunday, February 13, 2005 9:38 PM
To: Simpson
Cc: gdal-dev at xserve.flids.com
Subject: Re: [Gdal-dev] gdal_contour


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,
--
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