idl培训教程，PPT格式,讲解比较相信-idl training course, PPT format, explain the more I believe

ENVI-IDL入门教程，浅显易懂，适合初学者-ENVI-IDL Tutorial, easy to understand for beginners

使用idl编程裁切的地图数据，自己绘制的渤海湾，良好的性能，让你更好地学习和作为参考。-using idl language to program，get a map about bohai guy。this map is so good that you can obtain a simple way to learn。