Co-operative study of comparative planetary geology using digital image information

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In the study of planetary geology, digital data of surface images of planets and satellites are the important clue and image processing systems are necessary instruments. In our project, adding data reader/recorder instruments and using appropriate softwares, we can utilize pre-existing personal computers and workstations for the image processing of digital data. As a center of data control and our network, we introduced a database machine at Nagoya Univ. (now at Toho Junior College). This machine is now used not only by our group but also by larger planetary science community in Japan.In our group, volcanic activity history of Mars, landslides on Venus, lava flows on Venus, tectonics on Venus, development of image processing method using genetic algorithm, image processing of asteroids, shape of small bodies and impacts, application of ocean data base, size distribution of craters on icy satellites, Venus-Earth CD-ROM were done by the member of this co-operative study.On 94-10-05, "Planetary Geology" workshop was held at Nagoya University. We had about 25 attendants. On 95-01-17, the summary workshop of the present co-operative study was held at the University of Tokyo.