Magellan 760 参考手册

11

Each location also must have an Altitude. Altitude is expressed by how far the point is above or below the level of the ocean, 
or Sea Level. For example, Los Angeles, California is about 92 meters above sea level. Death Valley, California is about 82 
meters below sea level.

Sea Level 0m

20m Above

40m Above

60m Above

80m Above

100m Above

100m Below

80m Below

60m Below

40m Below

20m Below