I use QGIS 2.14.10

I am trying to clip a raster with a vector layer mask (shapefile)using the clipper tool (gdal). There is an offset betwween the resulting raster and the vector mask (see picture below).

I also tried with the saga script : clip raster with polygon. This one is working correctly but can only open a temporary file. If i try to save hard file i have this message : "ERROR 1: Can't load requested DLL: C:\PROGRA~1\QGIS2~1.14\apps\saga\dll\gdal_MrSID.dll 127: La procédure spécifiée est introuvable."

I need to clip a raster with a polygon ina script.

enter image description here

  • Your datasets probably have different coordinate systems
    – Albert
    Jan 9, 2017 at 16:14
  • I don't think it come from that. I have the same coordinate system
    – Panvjim0
    Jan 9, 2017 at 16:55
  • And the project and output too?
    – Albert
    Jan 9, 2017 at 16:58
  • yes. I Use the same coordinate system for project and all layers. And when i try to use the SAGA script "clip raster with polygon" i don't have this problem
    – Panvjim0
    Jan 9, 2017 at 17:00
  • If you look at the top of the picture. You'll see that the result is not only shift but also that it is not exactly the same shape
    – Panvjim0
    Jan 9, 2017 at 17:04

1 Answer 1


Actually, it's coming from the rasterize command : the polygon vertices are on the center of each raster source pixel. When the polygon is rasterized, the pixel are shift of 1/2 pixel.

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