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How to convert a point grid to a raster?

I´d like to convert a regular grid (25 meter) of points (XYZ) to a raster. I have tried the GRASS-tool r.in.xyz but I always get a integer raster where all cells have a value of 1.

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marked as duplicate by whuber♦ Sep 18 '12 at 16:33

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Go Raster -> Conversion -> Rasterize. Set a vector layer to process, a field with values and desired raster size.

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Thank you SS_Rebelious, it works but I´ve still one problem: The points I have are mid points, after rasterizing, the point is located at the corner of a cell. The raster should be moved 12.5 m to the west and north. Do you have any idea? Thank you – GISbert Sep 18 '12 at 15:03
@ GISbert, this is a subject for another question: you should provide a screenshots and information about projections used in vector layer, project and raster. And may be even sample of your data to play with. – SS_Rebelious Sep 18 '12 at 20:36

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