Surveying

of Survey

That branch of applied mathematics which teaches the art of determining the area of any portion of the earth's surface, the length and directions of the bounding lines, the contour of the surface, etc., with an accurate delineation of the whole on paper; the act or occupation of making surveys.

the practice of measuring angles and distances on the ground so that they can be accurately plotted on a map; "he studied surveying at college"