From Wikipedia, the free encyclopedia

The Geographical Survey Institute of Japan (国土地理院, Kokudo Chiri-in ^?), or GSI, is the national institution responsible for surveying and mapping the national land of Japan. It is an organization attached to the Ministry of Land, Infrastructure and Transport.

Its main offices are situated in Tsukuba City of Ibaraki Prefecture.

It also runs a museum, situated in Tsukuba, the Science Museum of Map and Survey.

Earthquake Precursor Prediction Research

Stationary MT monitoring systems have been installed in Japan since April of 1996, providing a continuous recording of MT signals at the Mizusawa Geodetic Observatory and the Esahi Station of the Geographical Survey Institute of Japan. These stations measure fluctuations in the earth's electromagnetic field that correspond with seismic activity. The raw geophysical time-series data from these monitoring stations is freely available to the scientific community, enabling further study of the interaction between EM events and earthquake activity. The MT time series data from the GSIJ earthquake monitoring stations is available online at http://vldb.gsi.go.jp/sokuchi/geomag/menu_03/mt_data-e.html

The GSI in fiction

The GSI featured in the novel Norwegian Wood by Haruki Murakami as the intended workplace of his roommate, "stormtrooper". At the time the novel was set, in the late sixties, the GSI was situated in Tokyo.

See also

• Japanese maps, the history of mapping in Japan.
• Japanese map symbols, the official symbols used by the GSI in maps.

External links

• GSI home page, in Japanese

• GONET(GPS Earth observation Network System), in Japanese