对矿区独立坐标系改造方法的探讨

在投影变形超过限度的矿区进行地质测量时，一般要建立矿区独立坐标系，目前常用的方法为椭球膨胀法。由于独立坐标系与国家坐标系坐标数值上存在差异，造成新的测量图件与早期地质图件不好衔接、用图不便等一系列实际问题。为了解决这些问题，本文提出了一种矿区独立坐标系的改造方法，并通过实例对比分析，认为这种改造方法是可以实施的。

Discussion on Methods of Independent Coordinate System Transformation of Mining Areas

When the geological survey is conducted in the mining area beyond the projection distortion limit, the mining area independent coordinate system is usually established and at present ellipsoid expanding model is the common method. The difference between the independent coordinate system and national coordinate system results in a series of practical problems,such as the incoherence between the new surveying maps and the early ones, and thus the inconvenience in using the maps. In order to solve these problems,this paper proposes a mining area independent coordinate transformation method which is considered feasible through the comparative analysis of examples.