Comparison of aerial photography after the disaster in bailongjiang, Zhouqu County.

The left picture shows the sight of white dargon river before the calamity; The right picture shows the sight of the same place after the calamity

Released Time: 2010-08-11

Source： National Administration of Surveying, Mapping and Geoinformation

Link： http://blog.163.com/mingxing163_com/blog/static/138454495201071155411402/