The coefficient of determination shows a much higher value, with an  R2 of 0.47.  Even if this is an improved value to the other methods considered until this point, it is still not high enough to allow for a good model. This is shown by the residues, which are still excessive, with the largest residue having a magnitude of 320.2 m. The standard deviation map illustrated in Fig. 7 shows once again that extreme values are rather situated where the number of neighboring cells is lower, meaning next to the border of the municipality or in less inhabited areas.