世界測地系に地図投影されたランドサットETM+画像のオルソ補正

抄録

Landsat ETM+images geocoded on the UTM coordinate over the World Geodetic System are now available. Although geometric accuracy of the images is much higher than that of Landsat TM images because of GPS based orbit information, there usually remains topographical relief displacement, which is significant for off-nadir part of the images over rugged terrain.
This paper describes a method for ortho-rectifying the geocoded images. Direction and distance between a target pixel and nadir point are estimated using the geometric features of the actual data region in the images. Utilization of the digital elevation model geocoded over the Japan Geodesic System is also considered.