Aeromagnetic Reconnaissance Survey Data

The Geological Survey of Japan has carried out developments on the
exploration and analysis techniques in aeromagnetic survey since 1964,
when the research on aeromagnetic exploration was begun on full
scale. And since 1969, explorations for various purposes as well as
investigations for assessing the deposit of hydrocarbon resources in
the continental shelf area surrounding Japan have been carried
out. The results were already published as the Aerial Aeromagnetic Map
series, and the data were stored in magnetic media in the form of file
groups with unified formats.