数字正射影像坐标系变换及精度分析

Coordinate System Conversion of Digital Orthoimage and Accuracy Analysis

现有数字地图产品基于两种主要坐标系，但是数字地图在各个领域的应用需要不同坐标系的产品。随着遥感以及计算机技术的发展，数字正射影像在其他领域有了广泛的应用需求。本文介绍了坐标系变换的原理，对坐标系以及数字正射影像坐标系变换的方法进行了阐述，论述了其实现过程及方法，最后进行了相应的精度分析。

The existing digital maps are based on two primary coordinate systems . However, the digital map products with other coordinate systems are needed in some application fields. With the development of remote sensing and computer technologies, the demands for digital orthoimages are increased quickly in many application fields . In this paper , the principle of coordinate conversion is introduced at first , and then the method of coordinate system conversion for digital images and their implementation are described, finally , the accuracy analysis are carried out.