I am trying to undertake a supervised OBIA of vegetation types on a sentinel 2 image. I am having trouble using a point shapefile as training data in the ENVI example based classification. My training data is based on a stratified random sample of a polygon layer containing 13 vegetation type classes. When I add it as ground truth data, it does not seem to choose the attributes in the field selected to assign classes and seems to assign them randomly. I am not sure how the training data is being utilised in this case.