GDAL 在地理国情监测项目中的应用

摘要

In the geographic national conditions monitoring project , a large number of satellite remote sensing images are used , and the single panoramic image is usually larger than 2GB.By using the dynamic sub -block function of GDAL,we can fast and efficiently read and process those mass data images .Then,we use the scan line algorithm to obtain effective border of image in the geographic na -tional condition monitoring project , and achieve image edge matching and image coordinate range checking .%在地理国情监测项目中，使用了大量的卫星遥感影像，这些卫星遥感影像单景数据都大于2 GB。利用GDAL的快速高效的影像读取功能，动态分块读取图像，能够很好地处理这些大数据，采用扫描线算法提取地理国情监测项目的影像有效边界，实现影像接边和影像坐标范围检查。