I want to add a plain floating point value as a user input (model input) to a raster.
For example, I want to calculate +4.3 to each cell of the raster. I remember this can easily be done in ArcGIS using (I think it's called) MathAlgebra.
In QGIS, I cannot find how to achieve it. The raster calculator algorithm doesn't let me reference a single numerical input as can be seen from the screenshot.
Are there other algorithms I can use? I read in some qgis manual, that you should be able to reference variables from previous calculation outputs, but I have no idea how to do this with a single numerical value.
I use QGIS-2.2.0 Valmiera.
I updated to 2.8.2 and there is an option, that was also available in 2.2., which is described in the Calculator tool. You can refer to model values by referencing a variable.
+a->float value in the formula field of my Raster calculator step. I am not sure if I got the point how to use it correctly.
I couldn't yet verify because of some error (might be a different problem with my model) the model did not run correctly.