[gdal-dev] How to cut a Raster map with a KML file

[Luis Lisboa]

Hi Eli
Probably I was not clear: When I use this it outputs a geotiff with two
bands: 1 with the real data and another one with the mask of the pixels
that fall inside each polygon. I just want to have an output file with one
band (band 1) and without the mask. Is it possible?
Thanks
Luis



On Thu, Sep 6, 2012 at 4:50 AM, Eli Adam <eadam at co.lincoln.or.us> wrote:

> Luis,
>
> On Wed, Sep 5, 2012 at 3:00 AM, Luis Lisboa <luislisboa1975 at gmail.com>
> wrote:
> > Thank you Chitanya.
> > But it created an output file with two layers (one with the values from
> > original file and another with a 255 for the pixels thar are inside KMZ
> > file: How can I have produce one layer?
>
> I may be thinking of something else based on your description.  If you
> got an output that has the original values in the area of the kmz and
> an alpha mask band over the other areas I think that would be
> expected.  You can also use -crop_to_cutline to remove that 'extra'
> data.
>
> If that isn't what you are talking about, you may want to use ogr2ogr
> to convert your kmz to a shapefile in the same projection as your
> input raster and see if it gives you a better result.
>
> Bests, Eli
>
>
> > Thanks
> > Luis
> > On Mon, Sep 3, 2012 at 5:10 PM, Chaitanya kumar CH <
> chaitanya.ch at gmail.com>
> > wrote:
> >>
> >> Luis,
> >>
> >> gdalwarp has some options for this exact purpose.
> >> The cutline can be from any of the OGR readable datasource.
> >>
> >> http://www.gdal.org/gdalwarp.html
> >>
> >> On Mon, Sep 3, 2012 at 9:34 PM, Luis Lisboa <luislisboa1975 at gmail.com>
> >> wrote:
> >>>
> >>> Greetings
> >>> I have a raster file (Geotiff) and I have a KML file with a polygon
> and I
> >>> want to cut raster map to only have valid values inside the polygon.
> How can
> >>> I do this using just GDAL?
> >>>
> >>> Usually I used to cut geotiff file with gdalwarp and but in those
> cases I
> >>> was cutting a square (xmin xmax ymin ymax) and in this case is a more
> >>> complex polygon
> >>>
> >>> Thanks
> >>> Regards,
> >>> Luis
> >>>
> >>> _______________________________________________
> >>> gdal-dev mailing list
> >>> gdal-dev at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
> >>
> >>
> >>
> >>
> >> --
> >> Best regards,
> >> Chaitanya kumar CH.
> >>
> >> +91-9494447584
> >> 17.2416N 80.1426E
> >
> >
> >
> > _______________________________________________
> > gdal-dev mailing list
> > gdal-dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/gdal-dev
>
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