最小二乘法数据处理，最小二乘法的基本原理和多项式拟合-Least squares method for data processing, the basic principle of least squares and polynomial fitting

GIS中很多地方需要进行数据拟合，这个文档很好的介绍了如何进行数据拟合-Many places in the GIS data fitting, this document is a good introduction to how data fitting

曲线拟合资料，自己学习过程中积累的一些文档，包含多种数据拟合方法。-Curve fitting data, some of the documents accumulated in their own learning process, contains a variety of data fitting methods.