Table 1.

Validation statistics for the KC and RS methods.

No. of validation monitors	32	13	14	4	6	5
Mean distance from monitors to estimation sites (km)	7.6	20.9	39.1	56.5	65.5	106.0
MSE
KC	1.229	1.610	1.871	0.699	1.145	2.762
RS	4.516	5.307	7.320	1.555	3.014	2.230
MSE change (%) RS to KC	–72.796	–69.672	–74.438	–55.066	–62.017	19.270
MAE
KC	0.799	1.084	1.172	0.781	0.993	1.377
RS	1.551	1.883	2.264	1.019	1.626	1.279
MAE change (%) RS to KC	–48.512	–42.401	–48.261	–23.384	–38.940	7.223
ME
KC	0.228	0.035	0.511	0.108	–0.586	–0.842
RS	0.202	0.402	2.264	1.019	0.148	0.088
Pearson r
KC	0.929	0.873	0.882	0.071	0.861	0.886
RS	0.733	0.534	0.879	0.644	0.447	0.908
Spearman ρ
KC	0.826	0.786	0.917	0.200	0.600	0.800
RS	0.546	0.615	0.943	0.400	0.600	0.900