I want to use the GRASS function
r.lake.xy on a DEM that I have.
I load the DEM raster into QGIS, it is not georeferenced. Then I create a New Mapset. I set Projection
Not defined. I either leave the Default GRASS Region, or set it to
90/-90/180/-180(I've tried both). I'm told my Mapset (named DEM5) is successfuly created.
I open GRASS tools and select
The first strange thing is the dropdown for
Name of input elevation raster mapdoesn't allow me to select either of the options ('DEM5' or 'Permanent'). So I type in DEM5.
I type in Seed point coordinates and Water level and name my output file.
I click run but I'm given the error message:
Cannot read raster map region - pathname: Unable to open header file for raster map DEM5@DEM5.