Series of elevation design in AutoCAD
The elevation of a geographic location belongs to its height over or underneath a fixed reference point, generally a reference geoid, a mathematical model of the Earth’s sea level similar to equipotential gravitational surface.
Elevation, or geometric height, is primarily applied while referring to points on the Earth’s surface, whereas altitude or geopotential height is applied for points over the surface, like an aircraft in flight or a spacecraft in orbit, and depth is applied for points underneath the surface.
Link for download - Elevation Drawings in AutoCAD
Download AutoCAD 2017 Free Trial
Image Courtesy: onlinecivilforum.com