NATIONAL SAMPLE COVERAGE
Soil samples from across Japan,
brought together on one map.
How many soil samples have arrived—and from where? Explore samples collected across Japan by municipality, collection date, land use, and N2O emission rate.
4,041SAMPLES
2,764SITES
47/47PREFECTURES
559/1896MUNICIPALITIES
Sites are counted from identical latitude–longitude pairs. Precise location data is not published.
EXPLORE THE MAP
Sample collection by region
Zoomed out, the map shows prefectures; zoom in to explore municipalities.
MAP COLOR
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Fewer
MoreWhite: 0 samples