surveyor

noun

1. A person occupied with surveying: the process of determining positions on the earth's surface.

   “The "D.N.B." wrote of one Railway Member that "he made himself personally acquainted with the working of the new systems of railroads, and with more foresight than his neighbours, he welcomed railways on his estate when other landowners were ordering their gamekeepers to warn off the surveyors or to put an end to their operations by force."”

2. One who carries out a survey or poll.
3. (UK)A person charged with inspecting something for the purpose of determining its condition, value, etc.

   “Other costs associated with selling a home include surveyor's fees, legal fees, estate agent's commission, stamp duty and the VAT.”