Welcome To Preston Trail Land Surveying Your first step in any new project is the land survey. A quality land survey can play a significant role in establishing land maps, determining boundary lines, preventing property disputes, and can even help reduce insurance rates. Land surveying involves a complex combination of engineering, math, physics and law, and is used to determine the three-dimensional position of points and the distances between them. It's not something you want to leave to amateurs. Our mission at Preston Trail Land Surveying is to set the standard for excellence in the industry by providing the highest quality and most efficient land surveying services in North Texas.