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Altitude
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 300 feet above sea level. Death Valley, California is about 270
feet below sea level.
Sea Level 0’
20’ Above
40’ Above
60’ Above
80’ Above
100’ Above
100’ Below
80’ Below
60’ Below
40’ Below
20’ Below