"Elevation levels" refers to the different heights or altitudes of a location or surface in relation to sea level. It is a measure of how high or low something is above or below the earth's surface. Full definition
While checking out screens, I also notice the game will also include different elevation levels. (slashgamer.com)
Definitely, if your possession is kept below the base flood elevation level, there is tendency that they will be affected if flood occurs. (myfinancekits.com)
The Pukalani Country Club is nestled at the 1,100 foot elevation level of world famous Mount Haleakala, an extinct volcano whose name in Hawaiian means «House of the Rising Sun» and is appropriately reflected as the golf course's logo. (pukalanigolf.com)