Re: [gdal-dev] Overlay shapefile onto Geotiff image
Graeme B. Bell wrote You'll need to tell it what size you want to burn. You can do that by looking at the extents (northeast, southwest) of your current raster/geotiff. If you make a copy of the Geotiff you already have, you can provide it as the 'destination dataset' for gdal_rasterize, it would then (of course) automatically pick up all the output properties for you. You can then for example first burn with value 1, and then to another pass with burn value 0 and set the '-i' flag to invert the rasterization, that way anything not touching the lines will be set to 0, which you can later use as a nodata value to get the transparency. Note that the destination dataset for gdal_rasterize gets modified 'in place', so especially when experimenting make sure you always have a copy/backup. -- View this message in context: http://osgeo-org.1560.x6.nabble.com/gdal-dev-Overlay-shapefile-onto-Geotiff-image-tp5209980p5210923.html Sent from the GDAL - Dev mailing list archive at Nabble.com. ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Overlay shapefile onto Geotiff image
Hi, I have been working on this issue for quite a while. I currently have a GeoTiff image and a shapefile. I would like to overlay the shapefile on the Geotiff, is this possible with Gdal? I looked into gdal_rasterize but I just don't know how to incorporate it with what I need. A code to start with would be great if possible. Or maybe point me into the right direction of probably other libraries that could do this. First, turn your shapefile into a geotiff. You can do this by reading the documentation and searching google for gdal_rasterize. You'll need to tell it what size you want to burn. You can do that by looking at the extents (northeast, southwest) of your current raster/geotiff. Second, overlay the 'shapefile geotiff' onto the other geotiff. To do this, read the documentation for gdal_merge.pyor gdalwarp Both of them can do what you want. And look for some online articles about those tools for practical examples. For example, read this and try to practice it: http://geoinformaticstutorial.blogspot.no/2012/11/convert-shapefile-to-raster-with-gdal.html Graeme Bell ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
[gdal-dev] Overlay shapefile onto Geotiff image
Hi, I have been working on this issue for quite a while. I currently have a GeoTiff image and a shapefile. I would like to overlay the shapefile on the Geotiff, is this possible with Gdal? I looked into gdal_rasterize but I just don't know how to incorporate it with what I need. A code to start with would be great if possible. Or maybe point me into the right direction of probably other libraries that could do this. Thanks for the help ___ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
