esp#

Calculate the Error-SPAtial Pattern metric.

Based on Dembélé, M., Hrachowitz, M., Savenije, H. H., Mariéthoz, G., and Schaefli, B.: Improving the predictive skill of a distributed hy- drological model by calibration on spatial patterns with multi- ple satellite datasets, Water Resour. Res., 56, e2019WR026085, https://doi.org/10.1029/2019WR026085, 2020b.