Progressively improved Geological Information System extends the potential use of digital geological maps in Japan. The use of digital geological maps, however, still remains limited to those geologists familiar with the GIS. The digital geological map "Distribution and occurrence of Cenozoic volcanic rocks in Japan" is newly prepared to improve this situation. This publication comprises two CD-ROMs labeled as G-4 A and G-4B. G-4A contains conventional map files for use in the GIS. G-4B contains map-image files directly combined with explanatory files. These files work on any Web browsers, just like an illustrated guidebook and enable those people unfamiliar with both the GIS and volcanology to learn something about the Cenozoic volcanic rocks in Japan.

AIST Today Vol. 1, No. 6 (2001) 23