Also called altitude above sea level. Height above mean sea level. Sea level changes due to tidal action and other factors, so it is determined based on the mean sea level, which is the average of these. In Japan, the mean sea level of Tokyo Bay is considered to be 0m above sea level. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
海抜高度ともいう。平均海水面からの高さ。海面は潮汐作用その他によって変化するので,それらを平均した平均海水面を基準として定められる。日本では東京湾の平均海水面を海抜 0mとする。
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