But for previous major tsunamis, scientists just had measurements that tide gauges recorded near the coast or that surveyors later estimated from water damage on land. 但相對於過去的大海嘯，科學家只能得到驗潮儀在岸邊記錄到的測量值，或是勘測員事後依陸地毀壞程度所做的估測值。
A mathematical model of tide zoning correction is proposed.Based on the computational model, a new tidal correction mode using single suppositive grid tide station is designed. 摘要提出了一種顧及潮時差變化的多驗潮站多邊形潮汐分區改正數學模型，設計了海量多波束數據通用的虛擬單驗潮站改正模式。
