1. If the altitude of sea level is 0 m, then the altitude is + 450 m, which means (), and the altitude is - 102 1. If the altitude of sea level is 0 m, then the altitude is + 450 m, which means (), and the altitude is - 102 m, which means (). 2. The standard water level of a reservoir is 0 M. if the height above the standard water level is expressed by a positive number, then + 0.08 means (), - 0.2 means ()

1. If the altitude of sea level is 0 m, then the altitude is + 450 m, which means (), and the altitude is - 102 1. If the altitude of sea level is 0 m, then the altitude is + 450 m, which means (), and the altitude is - 102 m, which means (). 2. The standard water level of a reservoir is 0 M. if the height above the standard water level is expressed by a positive number, then + 0.08 means (), - 0.2 means ()

1 is 450 meters above sea level 2 is 102 meters below sea level 3 is 0.08 above standard water level
4 means 0.2 lower than the standard water surface