全球数据资源 Online Global Satellite Image and Atlas:http:/library.gmu.edu/resources/sci/Geog579.htm 可以下载Aster,QuickBird,IKonos,OrbView,LandSat, SRTM,MODIS数据的网站: http:/glcf.umiacs.umd.edu/data/ http:/ladsweb.nascom.nasa.gov/data/ NASA数据站.推荐 National Geophysical Data Center GSHHS - A Global Self-consistent, Hierarchical, High-resolution Shoreline Database v1.3 (13 Oct 2005) National Geophysical Data Center Coastline Extractor U.S. Geological Survey GTOPO30 is a global digita
