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GIS数据误差处理的阻尼最小二乘算法
The Damped Least Squares Iterative Algorithm of Error Processing of Data in GIS
【摘要】 应用非线性最小二乘平差方法阻尼最小二乘法研究了数字化数据误差处理 ,并将该方法与最小二乘条件平差进行了比较。理论和实验表明 ,在处理较大数字化数据误差时采用阻尼最小二乘平差方法 ,减弱了在条件方程线性化过程中产生的模型误差 ,提高了计算精度
【Abstract】 This paper presents a study on error processing of map digitized data with nonlinear least squares adjustment which is called damped least squares. This method is compared with least square adjustment. The theory and digitization experiment indicate that the damped least squares method is better in processing the bigger errors. It can reduce the model error in the linearization process of the condition equation and improve the calculation accuracy.
【关键词】 阻尼最小二乘法;
数字化数据误差处理;
迭代算法;
中误差;
【Key words】 damped least squares method; error processing of map digitized data; iterative algorithm; mean square error;
【Key words】 damped least squares method; error processing of map digitized data; iterative algorithm; mean square error;
【基金】 武汉大学测绘遥感信息工程国家重点实验室 (WKL( 0 1) 0 10 1) ;国家自然科学基金 ( 4 0 1760 3 2及 40 1740 0 6)
- 【文献出处】 测绘学院学报 ,Journal of Institute of Surveying and Mapping , 编辑部邮箱 ,2004年01期
- 【分类号】P208
- 【被引频次】6
- 【下载频次】294