Question

Study the extract of Survey of India sheet No 45 D/10, Topographical Map 8
(eastings 12 to 23; northings 17 to 28), and answer the following questions:
a)
What do the conventional signs given in the four-figure grid references
below mean?
303
(0) 2221 () 1825 Tip the figures in 1718​

Answer 1

Answer:

it is bench mark in the topographic survey sheet