height above sea level; elevation
Used in geography, weather reports, and official descriptions of altitude. Often appears in compound expressions like 海抜0メートル (zero meters above sea level).
この町の海抜は約500メートルです。
This town is about 500 meters above sea level.
In areas of low elevation, caution is needed for flooding.
This town sits on a hill 100 meters above sea level.
Since this area has a low elevation, there is a risk of flooding.
The village lies in a zero-elevation zone, so extra caution is needed in the event of a tsunami.