Surveying Consideration to Liquefaction Damage of Port-island in Kobe

Port-island is offshore artificial island of 436 hectare area which has both functions of a harbor and a city. The new city planning which surrounded residential area in a public institution has been done. Residential area is constituted in high altitude condominium and many community institutions of citizen hospital, international convention facility, international exhibition building is built as surrounding a condominium group.Kobe city received the big damage by South Hyogo earthquake that occurred at 5: 46 am on January 17, 1995. The people who can't get information of outside by the damage of life line and liquefaction damage spent an anxious few days. Our country is narrow, we need to continue construction of artificial island as utilization the space. So it is important to compare an amount of subsidence of building and ground of before and after an earthquake disaster.This paper describes liquefaction damage of Port-island using observation result of leveling and satellite image