利用C#窗体程序实现对shp文件的读取和绘制，并且能够进行墨卡托和兰伯特投影，利用道格拉斯普克法进行数据压缩-Use C# program implements a form to read and draw on the shp files, and the ability to Lambert and Mercator projection using Douglas Puck method for data compression