In simple word, land surveyor is person who helps you to prepare all land needs start from land survey until you get legal map for topographical information. Finding professional surveyor is as hard as finding property agent, but after you find best one, you will feel satisfied and then losing stressful. If you do not have reference for finding, so why do not you call property agent to ask about it? Commonly, before the developer build property to sell, he also uses or hire service from surveyor to know how risky and safe the land is.
When developer builds properties, he may not build on the people’s land. It is automatically the agent or developer knows how to find professional surveyor. You can tell about concerns of boundaries of your property, so he will give you recommendation and then you can call or coming to the surveyor directly after getting reference.