檢視吴淞高程系的原始碼

[[File:吴淞高程系.jpg|缩略图|[https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E5%90%B4%E6%B7%9E%E9%AB%98%E7%A8%8B%E7%B3%BB&step_word=&hs=0&pn=3&spn=0&di=550&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=330574042%2C3041852430&os=434160977%2C3459722055&simid=3522876385%2C159882747&adpicid=0&lpn=0&ln=247&fr=&fmq=1620126000697_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=https%3A%2F%2Fgimg2.baidu.com%2Fimage_search%2Fsrc%3Dhttp%3A%2F%2Fgss0.baidu.com%2F-vo3dSag_xI4khGko9WTAnF6hhy%2Fzhidao%2Fwh%3D450%2C600%2Fsign%3Dc4d574725eee3d6d22938fcf76264114%2Fd043ad4bd11373f017ea084aa30f4bfbfaed0409.jpg%26refer%3Dhttp%3A%2F%2Fgss0.baidu.com%26app%3D2002%26size%3Df9999%2C10000%26q%3Da80%26n%3D0%26g%3D0n%26fmt%3Djpeg%3Fsec%3D1622718072%26t%3Dac50a232702ac2de86966367de04fec3&fromurl=ippr_z2C%24qAzdH3FAzdH3Fzit1w5_z%26e3B2w4jdn9_z%26e3Bv54AzdH3FqAzdH3F80bccmmd_z%26e3Bip4s&gsm=4&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 原图链接][http://zhidao.game234.com/q/17855662.html 来自234问答]]]
'''吴淞高程系'''吴淞高程采用上海吴淞口验潮站1871～1900年实测的最低潮位所确定的海面作为基准面，所建立的高程系统称为“吴淞高程系统”。约在1900年，在黄浦江口左岸附近的吴淞海关港务司署内设立一个土中石质水准基点，测定石质水准基点的吴淞零点高程作为基准。