2Chung-Hyun,AHN,Seong-Ik,CHO,Jae Chun.Ortho-Rectification Software applicable for IKONOS high resolution images:GeoPixel-Ortho.IEEE,2001.
3Dr.Thierry Touting.Demystification of Ikonos.EARTH OBSERVATION MAGAZINE,July,2000.
4Liang-chien Chen and Chiu-Yueh Lo.GENERATION OF DIGITAL ORTHOPHOTOS FROM IKONOS GEO IMAGES.the 22nd Astan Conference on Remote Sensing,5-9 November,2001.