The remote sensing data provided on the Internet is a lot of nonsense. The addresses I recently used may not be complete, but they are absolutely usable:
Http://www.csdb.cn/
This is the site of the Chinese Emy of sciences, the data is very good, the speed is very fast, there are a variety of geographic and chemical data, remote sensing data has multi-spectral and high spectral (EO-1, epoch Data ), you can download the personal information for free after registration. We strongly recommend that you
Http://www.naturalresources.csdb.cn/xiazai/tm/tmxiazai.asp
Institute of Geographic Science and Resources, Chinese Emy of sciences, subject database of man-land system (formerly Chinese natural resource database), need to register
Http://glcfapp.glcf.umd.edu: 8080/ESDI/index. jsp
Download multi-spectral, meteorological, and elevation data
Http://edcsns17.cr.usgs.gov/NewEarthExplorer/
Mainly multi-spectral data, slow speed
From: http://alex-1949-c.blog.163.com/