Groundtruthing of the Sukhna catchment area map prepared by the Survey of India was conducted in 2019, nearly 15 years after the Punjab and Haryana high court accepted it as conclusive. However, findings of the exercise carried out in 2019 are yet to be made public.
Groundtruthing is the process of check the accuracy of remotely sensed data by means of in-situ (on the ground) observations, and helps in actual demarcation.
The entire catchment area of Sukhna Lake had been demarcated in the map prepared by the SoI in 1995, which was further reauthenticated in 2004.