直线化简的两种算法比较，一种是道格拉斯普克算法，一种是Structured_Walk_Method-Line simplification compared two algorithms, one is the Douglas Peucker algorithm, one is Structured_Walk_Method

在VS2010环境下利用ArcEngine开发的多种线段压缩算法，包括D-P算法的改进等-In the VS2010 development environment using a variety of segments ArcEngine compression algorithms, including the DP Algorithm, etc.

地图文件（txt）读取，显示，分层显示，放大，缩小，DP算法压缩，选取。-Map file (txt) to read, display, hierarchical display, zoom in and out, the DP algorithm compression, select.