0

ENVI 5.2.1. From a .tiff image (4 bands) I created a Supervised Classification Maximum Likelihood .dat file. Now I want to perform an Accuracy Assessment using test data from a shapefile. I've tried using the tool -> Confusion Matrix Using Ground Truth ROIs. When the Classification Input File window appears, I select my MaxlikeSupervised.dat file and I get an error "There are no available ROIs or EVFs associated with this input file"

Do I have to create and ROI file?

How do I do this?

Do I need to use Ground Truth image and how do I get this?

All the files I have is that one image file which I created a supervised classification .dat file and I have test data points from a shapefile to match it up to the .dat file.

1

You can/must convert your .shp file to ROI in ENVI. Go to vector > convert vector to ROI and select your shapefiles.

Check this video for converting to ROI https://www.youtube.com/watch?v=ukrgGUkxJlU from 7:20

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.