测试GDAL是否安装完成，也就是GDAL库的几个API接口函数的介绍。-GDAL test whether the installation is complete, that is, a few GDAL library API interface function introduction.

采用GDAL库实现图像分割的功能，用c++实现，里面包含源代码和已编译好的GDAL库文件(The application use the GDAL library to cut the jpeg picture.The application was writted with c++ .There is a GDAL library in the package.)