ROI	Region of interest
STI	Spatio temporal interpolation
DDW	Distribution-based distance weighting
IDW	Inverse distance weighting
AIDW	Angular IDW
GIDW	Gradient IDW
SK	Simple kriging
OK	Ordinary kriging
BK	Bayesian kriging
UK	Universal kriging
CAR	Clustering assisted regression
TPS	Thin plate splines
RBF	Radial basis function
RF	Random forest
RFIDW	RF + IDW
RFOK	RF + OK
TS	Trend surface
TP	Thiessen polygon
RMSE	Root mean squared error
MAE	Mean absolute error
SE	Standard error