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To convert raster grids to vector points In QGIS there we have different possibilities (grass tool "to.vect"; saga tools "grid values to points").
My problem is a little bit complicated. In the beginning I have a point layer. For further data processing I need to convert the vector points to a raster file (every point is a raster now). In the end I want to convert this raster (raster points) backwards to a point layer for the kriging tool.
The grass tool (to.vect) is very slow and the saga tools (grid values to points) gives me more than just the points I need to have (I get a very high density point shape). Is there another solution just to convert the few rasters into a point layer?