During construction of Donghai Bridge of Yangshan Deep-water Port, bedrock bench mark, which is an important surveying datum mark, played an important part in control survey and elevation transmission.

• 摘要基岩标是重要的测量基准设施，在洋山深水港东海大桥的工程建设中发挥了控制测量与高程传递的重要作用。