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I have a shapefile (polygon) that I want to rasterize by an attribute but the rasterize tool does not recognize the right field. When I create a new field using the field calculator it does not matter what type I choose (integer, real, ...) the result is qlonglong (integer64), a type that the rasterize tool apparently does not recognize.

  • Which QGIS version do you use? Sounds like a bug report – underdark May 14 '17 at 17:28
  • I am running Qgis 2.18.7. I solved the problem using the rasterize tool from the processing toolbox. However the fact that the filed calculator seems to ignore the "type" you choose when creating a new field seems like a bug to me. – Konstantin_o May 15 '17 at 15:42
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Here is a list of fields that contains different type of fields: integer, String, and qlonglong (integer64).

enter image description here

If you access the Rasterize tool from Raster -> Conversion -> Rasterize (Vector to raster) you will see only the fields that are integer type.

enter image description here

To get integer type not qlonglong (integer64), the length should be from 1 to 9 when you define a new field, as you can see below:

enter image description here

However, if you accessed the Rasterize (Vector to raster) tool from Processing toolbox -> GDAL/OGR -> [GDAL] Conversion -> Rasterize (Vector to raster), you will get every type in the attribute table even the string type, as you can see below:

enter image description here

My recommendation is to use the rasterize tool from Processing toolbox.

  • Thanks for the hint. The Rasterize (Vector to raster) tool from Processing toolbox reads other types than "int". – Konstantin_o May 15 '17 at 15:24

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