What does "the demarcation of the boundary, as depicted in the above-mentioned Index Maps" refer to?
The demarcation of the boundary, as depicted in the above-mentioned Index Maps, refers to the drawing and marking of the actual boundaries between territories held in Adverse Possession. This is done through joint surveys conducted by the Land Records and Survey Departments of both India and Bangladesh. These maps depict the agreed upon boundaries between the two countries as determined through these surveys.