math processing
1.In the module of data processing, the co-program method was presented by integrating VC++6.0 and Matlab seamlessly. By compiling the functions in the Math Library of Matlab C/C++ into Dynamic-Link Library(.DLL), the sharing function library for data processing was established.
2.The basic concept of terrain information content is proposed after an overall review of existing research achievement. Applying a series of analysis and data processing method, like math-analysis, mathematical statistics, comparative, error visualizing, this paper carefully investigated the terrain information content characteristic of DEMs of 1:50000 map scale of Loess Plateau Area.
