几何校正是遥感信息处理中十分重要的环节，直接关系到信息提取的精度与使用程度。分析遥感畸变原因，介绍矫正原理和方法。envi下校正-Geometric correction is a very important part of the remote sensing information processing, is directly related to the degree of accuracy with the use of information extracted. Analysis of remote sensing distortion reason to introduce the principles and methods of correction. a envi under alignment