"validation raster vs pixel based, numeric vs. factor predictors"
"validation sample coords and geometries are returned"
"predict.superClass map is identical to superClass$map"
"external valData instead of trainPartition"
"superClass works with a single RasterLayer"
"fails if no validation points remain after clipping"
"Found na value on valid superClass while testing sampling methods"
"Not enough observations.*to perform SMOTE"
"Found na value on valid superClass while testing rose-sampling"