Question

why did the British feel the need to survey India​

Answer 1

Answer:

The 4th Great Ninja War is the greatest known event in the story of Naruto and it saw all the shinobi nations unite their forces against the evil that was Madara Uchiha. The goal of the war was to stop the rebirth of the Ten-tails and make sure project Tsuki no Me didn't come to fruition.

Answer 2

As they expanded their trade in India to gain profit, they surveyed so that they can analyse how much they had expanded and record it for their benefit. After surveying, it became easy for the British in terms of revenue collection and to map all the places.