该程序提供了几种图像文件的显示，尤其是可提取geotiff文件的地理信息，可以进行2D和3D显示以及缩放，使用了开源的库有geotiff,jpeg,libtiff,proj四个-the program offers several images of documents, in particular document can be extracted GeoTIFF geographic information that can be 2D and 3D display and zoom, th