1. Nilgiri district: Coonoor municipality topographical map (Sheet 1) Maps University Of Minnesota Public content 1942. Great Britain Survey of India. 100 x 136 centimeters, on sheets 50 x 68 Scale [1:6336]; 1 inch = 528 feet or 10 inches = 1 mile Ames Library of South Asia Maps. Great Britain Survey of India; Great Britain.