datum point

基本解释

A virtual face and a datum point which embody basic semantics requirements are two low level objects.
通过对问题域最基本需求的抽象，提出了两个反映基本需求的对象：虚面、基准点。
This article introduces resection locating temporary work datum point by distances and angles in control network for deformation observation.
介绍了应用全站仪测边、测角后交定点的基本原理和布设变形监测网中临时工作基点方法。
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准点的变形原因和规律，得出了一些有益的结论和建议。