Hello Jorge (portuguese?) The problem is not the KML. GDALwarp supports the usage of KML to cut Raster file. The thing is that it generates a Geotiff file with two bands: 1 with the masked values and another with just value of 1 in the valid pixels (a bitmask). Is it possible to generate a geotiff with onluy the first band? Thanks Luis
On Tue, Sep 11, 2012 at 8:25 PM, Jorge Santos <jorgepsantos2...@gmail.com>wrote: > Hey, you can convert the KML to shapefile with *ogr2ogr* and use this > shape to cut the raster data. > > STEP01: Convert a single KML to Shapefile: > > *ogr2ogr -f "ESRI Shapefile" output_shapefile.shp input_kml_file.kml* > > STEP02: Crop the raster with polygon shapefile with gdalwarp. This command > will crop the raster by extent of shapefile: > > *gdalwarp -crop_to_cutline -cutline output_shapefile.shp input_raster.tif > clipped_raster.tif* > > PS: -crop_to_cutline => GDAL >= > 1.8.0<http://www.gisinternals.com/sdk/>required > > cheers > > Jorge Santos > > > 2012/9/11 Luis Lisboa <luislisboa1...@gmail.com> > >> 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 <ea...@co.lincoln.or.us> wrote: >> >>> Luis, >>> >>> On Wed, Sep 5, 2012 at 3:00 AM, Luis Lisboa <luislisboa1...@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...@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 <luislisboa1...@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@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@lists.osgeo.org >>> > http://lists.osgeo.org/mailman/listinfo/gdal-dev >>> >> >> >> _______________________________________________ >> gdal-dev mailing list >> gdal-dev@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/gdal-dev >> > >
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