Nan Lu, Chengqi Cheng, An Jin, Haijian Ma. An index and retrieval method of spatial data based on GeoSOT global discrete grid system. In 2013 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2013, Melbourne, Australia, July 21-26, 2013. pages 4519-4522, IEEE, 2013. [doi]