1. Xiong Y, Zeng G, Lv HH, et al. Synthetic Assessment of the Eco-Environment of Hunan Province Based on Multi-Source Spatial Information. Journal of Hunan University (Natural Sciences); 2007, 34(10): 86-9.
2. The world heritage committee, the name list of world heritage, 1999.
3. Yu, Li DH, Li W. Values of the Jiang-hang Grand canal.Journal of geography development;2008,27(02):1-9.
4. Ecological environment evaluation in Peking integrated RS and GIS;Liu;Beijing: Journal of Capital Normal University,2008
5. Mao F. National Science and Technology Support Project. Applied Research on the protection of the large ruins by Spatial information technology. Qinghua university, 2007.