在VC环境下利用OpenGL作出简单的三维坐标系，并画出一个简单点迹-In the VC environment, the use of OpenGL to make a simple three-dimensional coordinate system, and draw a simple point mark

用ArcGIS提取济南县界坐标数据，利用OpenGL读取数据文件并画图。(Using ArcGIS to extract coordinate data of Ji'nan County, and use OpenGL to read data file and draw pictures.)