Accuracy Assessment of an image classification in ArcGIS | ArcGIS Tutorial | v31

Accuracy assessment is the procedure used to quantify the reliability of a classified image. The standard accuracy assessment procedure is to construct an "error matrix." This is a square matrix in which the rows and columns represent the land cover classes from the classified image.
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[@akash.shafiqe]

It's really great. I have few queries. Please help me in this regard.
1. How can we calculate Kappa coefficient using the output data that you have shown here and What will be the Kappa coefficient formula for this?
2. Only composite image is enough to check accuracy as you did?
3. Could you please provide the reference so that I can cite in my paper?
Thank you very much.

[@KaziAlmuqtadir]

1. www.statisticssolutions.com/kappa-coefficients/#:~:text=The%20equation%20used%20to%20calculate,to%20calculate%20the%20Kappa%20coefficient. you can find kappa coefficient formula here.
2. You can use composite image or google image. Work in google earth pro to get this true point. And please recheck the time you are working in both ARCgis and google earth.
3. Please explicit about what reference do you need.
Thank you for watching our videos.

[@akash.shafiqe]

@@KaziAlmuqtadir Thank you for the nice reply.

[@abidulislam7103]

Nice video.
I have one query. How can i perform accuracy assessment on the landsat TM/MSS image?

[@KaziAlmuqtadir]

Just download the image and use it like a reference like google map

[@Bidyananda_Meitei]

Where does the geodata base in envioronment setting comes from ?

[@alifrahman2609]

Wow