Height above sea level; elevation measured from mean sea level, used on maps, in construction, and for tsunami planning.
この地点の海抜は50メートルです。
The elevation of this point is 50 meters above sea level.
海抜0メートル付近の地域は高潮や津波に注意が必要だ。
Areas near sea level (0 m) need to be careful about storm surges and tsunamis.
登山前に地図で目的地の海抜を確認した。
I checked the destination's elevation on the map before climbing.