[gdal-dev] raster to vector?

Chaitanya kumar CH chaitanya.ch at gmail.com
Mon Jul 4 02:42:44 EDT 2011


Nicholas,

You can use the gdal_polygonize.py script [1] to do this. You might also
want to go through the documentation for GDALPolygonize() function[2]. If
your raster is non-thematic, your vector dataset could get too big. ESRI
Shapefile format has a file size limit of 4GB.

[1]: http://www.gdal.org/gdal_polygonize.html
[2]: http://www.gdal.org/gdal__alg_8h.html#3f522a9035d3512b5d414fb4752671b1

On Mon, Jul 4, 2011 at 10:05 AM, <nicholas.g.lawrence at tmr.qld.gov.au> wrote:

> Hello,
>
> I have a one-and-a-half gigabyte ermapper .ers file, that has one band,
> with values of 0 to 7 (integers only).
>
> I would like to turn this into vector polygons, such as a shapefile or
> mapinfo table.
>
> Can I do this with GDAL?
>
> Kind regards,
>
> *
> Nicholas Lawrence*
> Senior Spatial Science Officer | Darling Downs Region / Toowoomba Office*
> Assets & Operations* Division | Department of Transport and Main Roads
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-- 
Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
+91-9494447584
17.2416N 80.1426E
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