What surveys did the British conduct in India?

The British conducted several surveys in India, notably the Great Trigonometrical Survey, which began in 1806 to measure the subcontinent's geography accurately. They also carried out the Census of India starting in 1871, which collected demographic data about the population. Additionally, the British undertook various agricultural and economic surveys to assess resources and productivity, influencing policies and administration. These surveys played a crucial role in mapping the region and understanding its socio-economic dynamics.