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Public Data (Map Information)

Data Name Description Download Explanations and Samples
Borehole Log Geotechnical surveys conducted by the Tokyo Metropolitan Government and geotechnical information provided by public institutions To "The Ground of Tokyo"
List of Soil Test Results Soil laboratory test results at borehole locations
PL Distribution Map Assessment results of liquefaction effects using PL at borehole locations Shape File View
Groundwater-level Distribution Map Groundwater-level distribution map used for the liquefaction potential map Shape File View
Liquefaction History Map Liquefaction history of The 1923 Kanto Earthquake and a map of areas extensively liquefied by the 2011 Tohoku earthquake Shape File View
Land Condition Map Map integrating the microtopographic units of the land condition map (issued in 1970) To “Geospatial Information Authority of Japan View
Water System Transition Map (Meiji Era: 1868-1912) Map of water areas, wetlands, sandbars, and oceans extracted from a topographic map (circa 1909) View
Water System Transition Map (Taisho Era: 1912-1926) Map of water areas, wetlands, tidelands, and oceans extracted from a topographic map (circa 1925)
Water System Transition Map (Showa Era: 1926-1989) Map of water areas, wetlands, tidelands, and oceans extracted from a topographic map (circa 1937)
Wetland and Paddy Field Distribution Map Map of wetlands , paddy fields, dry rice fields, Swamps, and wastelands extracted from a topographic map (circa 1937)
Landfill Material Classification Map Map of reclaimed waterfront areas classified by soil material Shape File View
Notes Creative Commons AttributionThis open data is provided under "Creative Commons Attribution 2.1 Japan License別ウインドウで開く".
  • Each data is relevant at the time of the survey and may differ from the current situation.
  • If you modify the data for use, you must clearly state that you have edited or processed the original data. Publication or use of modified data such that it appears as if it is created by the Tokyo Metropolitan Government is prohibited.