Rescaling raster values
When an analysis calls for multiple rasters to be combined mathematically, it is often desirable to have the values in each raster converted to a common scale. For example, in a site-selection analysis, you need the data values for the input rasters to be scaled from 0 to 100. This can be done by navigating to Processing Toolbox | GRASS commands | Raster | r.rescale tool. In the following example, the RiparianSurface.img raster with values ranging from 10 to 95.5 will be rescaled to a raster with values ranging from 0 to 100. To do this, perform the following steps:
- Select the input raster layer by clicking on the down arrow to choose a raster loaded in the canvas, or by clicking on the browse button.
- Specify The input data range to be rescaled.
- Specify The output data range.
- Select the output raster layer by clicking on the browse button and choosing Save to a temporary file or Save to file:
