That black line is India Bangladesh border. The red marker is on Petrapole Police Station. Petrapole is on Indian side.
Now as per Google map to go to Petrapole police station from within India one will have to cross border, go inside Bangladesh, take an u-turn from Bangladesh and then come back to India and visit the police station.
Man, for visiting an Indian police station from within India one will need passport and visa 😂
