@book{32375,
	author = {Guo, Huadong, ed.},
	title = {Sixth International Symposium on Digital Earth: Models, Algorithms, and Virtual Reality},
	publisher = {SPIE},
	year = {2010},
	series = {Proceedings of SPIE; V. 7840},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/7840}
}