it reviews the history and renovation process of the geodetic datum point in china and mainly describes the kanmen zero point.
介绍了青岛水準原点与坎门零点的联测过程,以及坎门零点的利用情况。
the cause and rule of deformation of datum point are analysized by data of repetition. finally, some useful conclusions and suggestions are also given.
根据复测数据分析了基準点的变形原因和规律,得出了一些有益的结论和建议。
this article introduces resection locating temporary work datum point by distances and angles in control network for deformation observation.