N.Y. Civil Practice Law & Rules § 4534: Standard of measurement used by surveyor

Rule 4534. Standard of measurement used by surveyor. An official

certificate of any state, county, city, village or town sealer elected

or appointed pursuant to the laws of the state, or the statement under

oath of a surveyor, that the chain or measure used by him conformed to

the state standard at the time a survey was made is prima facie evidence

of conformity, and an official certificate made by any sealer that the

implement used in measuring such chain or other measure was the one

provided the sealer pursuant to the provisions of the laws of the state

is prima facie evidence of that fact.