What is the significant role of surveyor?

Land surveyors work in the office and in the field. Out in the field, they use GPS, Robotic Total Stations, and aerial and terrestrial scanners to map an area, making computations and taking photos as evidence. In the office, Surveyors then use sophisticated software, such as Auto-cad to draft plans and map the onsite measurements. They also give advice and provide information to guide the work of engineers, architects and developers.

Thanks Ina-Irina so much for comment. but Ithink surveyor must have a role in taking any decision .not be just adviser or information provider.especially, when you deal with someone which no nothing about surveyor‘s role