[GRASS-user] How to convert BMP & JPEG files to Shape(.shp) format

[Daniel Victoria]

Potrace + Inkscape sounds interesting. Just out of curiosity, does
anyone knows if it could be used to vectorize scanned topo sheets?

Daniel

On Wed, Aug 27, 2008 at 9:04 AM, Paulo Marcondes
<paulomarcondes at gmail.com> wrote:
> 2008/8/27 Alpha GRASS <alpha.grass at gmail.com>:
>>
>> Dear all,
>> I need to convert some maps like Bmp & Jpeg format files into Shape(.Shp)
>> format on windows.
>
> errr....
>
> Look, in GIS parlance, bmp and jpg are raster formats. Shapefile is a
> vector format.
> So, no direct "conversion" between those.
>
> What you would do in a strict GIS environment, is to register
> (georeference) those images and then digitize whatever is important to
> a vector file.
>
>> can you please suggest me any open source tool to convert into shape files.
>
> Most GISes, specially the free ones (GRASS/QGIS) allow you to load
> those images and vectorize.
> However, I remember seeing something about some program that allow you
> to automagically vectorize a raster.
>
> Doing a google search I found the program: http://potrace.sourceforge.net/
> you can use it in Inkscape: http://wiki.inkscape.org/wiki/index.php/Potrace
>
> the wikipedia also know something about it: http://en.wikipedia.org/wiki/Potrace
>
> there are others:
> http://delineate.sourceforge.net/download.html
>
> While not answering exactly your question, that was the best i could
> find in google.
>
> Remember: google is your friend.
> --
> Paulo Marcondes = PU1/PU2PIX
> -22.915 -42.224 = GG86jc
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