光栅图形学基本算法实现 包括直线扫描转换算法，多边形扫描转换算法，区域填充算法，直线裁剪算法，多边形裁剪算法，消隐算法等(Implementation of basic algorithm for grating graphics)

计算点与面的关系，点与线的关系，在水域边界处理，地图边界自由裁剪方面可以借鉴(The relationship between point and surface and the relationship between point and line can be calculated. It can be used for reference in dealing with boundary of water area and free cutting of map boundaries.)

输入栅格文件和掩膜矢量，进行批量裁剪.python的版本为2.7，需要导入arcpy模块(batch clip rasters under python2.7 programm)

利用IDL批量对多个单波段影像合成单个多波段影像，利用SHP裁剪影像，以及影像重采样代码以MODIS影像为例(Combine multiple single-band images into multiple multi-band images using IDL batch, use SHP to cut silhouette images, and image resampling code to take MODIS images as an example.)