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I am wanting to use FWTools to rasterize a large number of Shapefile polygons. I have used the Rasterize tool in QGIS and it works great. But when I use the generated code in FWTools the process does not work. Here is the generated code:

gdal_rasterize -a COVTYPE -ts 5000 3705 -l LCC001k_dis
C:/GlobalData/Vectors/LCC/LCCRasters/LCC001k_dis.shp
C:/GlobalData/Vectors/LCC/LCCRasters/LCC001k.tif

Unfortunately, I am not a programmer, so I am not able to create my own script to perform this task. Can anyone assist me with why this code doesn't work in FWTools, or what changes I need to make to utilize the Rasterize functionality.

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  • Do you get any errors or other output when running the code command?
    – dakcarto
    Commented Jun 4, 2012 at 13:54
  • No there is no error message. It just brings up the usage.
    – Ryan Garnett
    Commented Jun 4, 2012 at 14:15
  • It would be good to mark an answer to this and previous questions as "accepted" by clicking the checkmark next to the answers.
    – RyanKDalton
    Commented Jun 4, 2012 at 15:28
  • FWTools uses an outdated gdal library, use binaries at gisinternals.com/sdk or QGIS.
    – user10353
    Commented Dec 19, 2012 at 22:40

1 Answer 1

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In my version of FWTools I don't think your command line would work either, it expects the raster to which you are burning the vectors to exist already. The version of gdal_rasterize that comes with recent versions of QGIS does not have this limitation, it can create the new raster. Nick.

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  • Thanks Nick. That was my suspicion, but I wanted to see if there was something I was missing. Do you know of any other way I may be able to do this via a command line? I want to batch the rasterization of hundreds of files.
    – Ryan Garnett
    Commented Jun 4, 2012 at 15:12
  • If you're in Windows you could run gdal_rasterize from an OSGEO4W window. Or from any command line window, if you put in the path to the QGIS version of gdal_rasterize. Nick.
    – nhopton
    Commented Jun 4, 2012 at 15:20
  • I just tried that with the same result: C:\Program Files (x86)\FWTools2.4.7>"C:\Program Files (x86)\Quantum GIS Wroclaw\bin\gdal_rasterize.exe" gdal_rasterize -a COVTYPE -ts 5000 3705 -l LCC001k_dis C:/GlobalData/Vectors/LCC/LCCRasters/LCC001k_dis.shp C:/GlobalData/Vectors/LCC/LCCRasters/LCC001kz.tif
    – Ryan Garnett
    Commented Jun 4, 2012 at 15:29
  • "...\bin\gdal_rasterize.exe" gdal_rasterize..." It looks as if you're calling gdal_rasterize twice :( Nick.
    – nhopton
    Commented Jun 4, 2012 at 15:43
  • Thank you Nick, those second pair of eyes helped. That was it. Thanks again.
    – Ryan Garnett
    Commented Jun 4, 2012 at 16:00

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