GPS工程控制网投影变形的处理

在ＧＰＳ工程控制网建立的内业处理中，为后续的方便必须设法高斯投影变形对坐标成果的影响，本文在简要介绍了常规投影变形处理方法之后，提出了尺度强制约束和投影面重新选择两种投影变形的处理方法。工程实践检验表明，两种方法不但可行而且可使处理后的坐标系统与国家坐标系统尽可能保持一致，方便了工程使用。

The Processing of Projective Deformation in GPS Engineering Control Net

In data processing of GPS engineering control net, the refluence of projective deforrnation must be removed. After sitnple introucing normal method, this paper put forward two methods of processing projective deformation, i. e. scale forced restraint and projective plane rechoosing. After engineering practical inspecting, two methods are not only feasible but also roughly identical on coordinate systern after processing with national coordintial system. It,s convenient for engineering users.