Industries & Professions /
Surveyors mark exact measurements and locations of elevations, points, lines, and contours on or near Earth's surface. They measure distances between points to determine property boundaries and to provide data for mapmaking, construction projects, and other engineering purposes. There are approximately 147,000 surveyors, cartographers, photogrammetrists, and surveying and mapping technicians employed in the United States. Of those, about 57,600 are surveyors and about 12,300 are cartographers and photogrammetrists.