Usually, elevations are also measured. Sometimes a hill must be lowered or a low area filled in. A level is use to make these vertical measurements.
when surveying land for a construction project, the surveyor's first task is to locate and mark the boundaries of the property. Wooden stakes are driven into the ground to mark the property lines.
the next step is to find and mark the exact location of the planned structure. To do this, the surveyor examines the drawings. Then, he or she locates and marks the outline of the building's foundation. the outline serve as a guide for the works who excavate an area for the foundation.