I am working with GRASS and I am trying to do a supervised classification. The issue here is that I get an error for NaN values.
ERROR: Not enough data points
Now I know that is an error that you get, most of the times, when the projection is different and because I know that I re-projected all of my data in GGRS87 (I have both vector and raster data) but I still get the same error. What should I do? Should I try another projection or is there another way to do supervised classification.
P.S I tried with this tutorial https://grasswiki.osgeo.org/wiki/Image_classification#Supervised_classification
and I tried to create a raster map from CORINE2000
g.region vect=corine align=raster
v.to.rast in=corine out=corine_training use=attr col=CODE labelcol=CODE2 --o
And now I can't generate statistics using
i.gensigset group=OB subgroup=raster_maps sig=corine_smap training=corine_training