Survey of India
Survey of India is a government agency or national mapping agency.
Also recorded as SOI; SI.
In detail
It is associated with British India. The record gives 1767 as its date of establishment or first appearance.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Survey of India”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1359276: Survey of India
Consult the source