Re: [gdal-dev] How to cut a Raster map with a KML file
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.comwrote: 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 = 1.8.0http://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 ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
Re: [gdal-dev] How to cut a Raster map with a KML file
Luis, On Tue, Sep 11, 2012 at 11:14 AM, Luis Lisboa luislisboa1...@gmail.com wrote: 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? Sometime images can clean up just be running them through gdal_translate. -ot or -b or -mask or some combination may additionally be needed. http://gdal.org/gdal_translate.html Does gdal_translate on your file collapse the mask band into a single band with no data values? rgb2pct.py can be used to convert RGB/RGBA to single band with a color table. I'm not sure if it would work with a two band image, one being the mask but you can try it and see what it does. HTH, Eli 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
Re: [gdal-dev] How to cut a Raster map with a KML file
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? Thanks Luis On Mon, Sep 3, 2012 at 5:10 PM, Chaitanya kumar CH chaitanya...@gmail.comwrote: 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.comwrote: 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
Re: [gdal-dev] How to cut a Raster map with a KML file
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
Re: [gdal-dev] How to cut a Raster map with a KML file
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 just one layer? Other thing: as far as I saw it procewssed the data without needing to have the KML and the Geotiff in the same CRS. Can anyone confimr that this is true? Thanks Luis On Mon, Sep 3, 2012 at 5:10 PM, Chaitanya kumar CH chaitanya...@gmail.comwrote: 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.comwrote: 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] How to cut a Raster map with a KML file
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
Re: [gdal-dev] How to cut a Raster map with a KML file
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.comwrote: 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
