Dear Grass community,
I am using r.sim.water (SIMWE) to model depth and discharge of an specific rain event in a small urban watershed in the city of Oslo, Norway. So far everything went ok. But, I am wondering about the output called Err. In the grass gis manuals https://grass.osgeo.org/grass64/manuals/r.sim.water.html describe […]the err raster map (the resulting water depth is an average, and err is its RMSE) […].
Q1: are error map and depth map supposed to have the same scale? ---- in this case from 0.0 – 1.87 meters
Q2: If yes, how I am supposed to interpret RMSE . If I query the cell I obtain the same value in both datasets.? So far I understand RSME (root-mean-square error (RMSE)) is a frequently used measure of the differences between values (sample and population values) predicted by a model or an estimator and the values actually observed.
I would appreciate any help.
Rengifo Ortega