Algorithm development of high resolution global DSM generation by ALOS prism

Panchromatic Remote-sensing Instrument for Stereo Mapping, one of onboard sensors carried by Advanced Land Observing Satellite, was designed to generate worldwide topographic data with its optical stereoscopic observation. The sensor had observed huge amount of stereo images all over the world during the mission life of the satellite from 2006 through 2011. To utilize all these archive data we proceed to generate new global elevation datasets, named `ALOS World 3D´, which have finer ground resolution and higher accuracy than the existing ones e.g., Shuttle Radar Topography Mission data. This paper briefly reports on latest algorithms for the production of the global datasets with preliminary results of its early operations. The accuracies and error characteristics of the datasets are analyzed and discussed by the comparison with reference data on various fields.