相关链接：http://www.tandfonline.com/doi/pdf/10.1080/02693799008941549
                 or http://www.mendeley.com/research/kriging-a-method-of-interpolation-for-geographical-information-systems/
                 or http://d.wanfangdata.com.cn/NSTLQK_10.1080-02693799008941549.aspx
作者：Oliver, M.A., Webster, R.,
题名：Kriging: a method of interpolation for geographical information systems.
来源期刊：International Journal of Geographical Information Science, 4(3), 313-332.1990.