Abstract
The Geological Map of Japan 1:50,000 shows fundamental national land information of the subsurface materials of the district, and is multifariously used for resources development, disaster prevention, industrial location, environment protection, and as the geological standard of the district. It is important basic information for understanding natural environments scientifically and is essential information for the sustainable development of society. While geological maps mostly made by universities or companies are for understanding specifically interesting strata or rocks, the 1:50,000 geological maps made by GSJ, AIST comprehensively integrate research results of all strata and rocks in the district and explain the geological evolution of the district without contradiction. There has never been any paper describing the process in developing the 1:50,000 geological map, which integrates geological researches for the district. The author shows his own development process with the 1:50,000 geological maps as examples.
