Data description

[Dataset A]
Initial Cs-137 deposition data within Fukushima Prefecture area following the Fukushima Daiichi Nuclear Power Plant accident.

[File name]
1. CSV file format
cs137a_point.csv

2. ESRI shape file format
cs137a_point.cpg
cs137a_point.dbf
cs137a_point.prj
cs137a_point.sbn
cs137a_point.sbx
cs137a_point.shp
cs137a_point.shp.xml
cs137a_point.shx

[Data area coverage]
withing Fukushima Prefecture area

[Datasource] 
1. The third airborne monitoring survey data (within the 80km radius area from the Fukushima Daiichi Nuclear Power Plant)
2. The fifth airborne monitoring survey data (outside of the 80km radius area from the Fukushima Daiichi Nuclear Power Plant) *Reduction of radioactivity due to natural weathering processes and radioactive decay were corrected (see the reference material for detail).
3. The prefecture airborne monitoring survey data (snow-covered area during the fifth airborne monitoring survey) *Reduction of radioactivity due to radioactive decay were corrected (see the reference material for detail).

[Data contents]
Cesium-137 deposition density data at the original data points of the airborne monitoring surveys (approximately 250m interval)

1. CSV file format
 >"OBJECTID" object identification code
 >"MESH" Mesh identification code
 >"Latitude" WGS1984, in decimal degree
 >"Longitude" WGS1984, in decimal degree
 >"Reference" reference date for Cs-137 inventory (yyyy/mm/dd)
 >"cs137_inve" deposition density of Cs-137 (Bq/m^2)
 >"landuse_co" landuse classification code by the National Land Numerical Information (MLIT, 2017). 10=paddy field, 20=other farmland, 50=forest, 60=Wasteland, 70=buildings, 91=road, 92=railway, 100=other, 110=river and lake, 140=beach, 160=Golf, 0=unclassified

2. ESRI shape file format
 >"FID"
 >"Shape *" data type
 >"OBJECTID" object identification code
 >"MESH" Mesh identification code
 >"Latitude" WGS1984, in decimal degree
 >"Longitude" WGS1984, in decimal degree
 >"Reference" reference date for Cs-137 inventory (yyyy/mm/dd)
 >"cs137_inve" deposition density of Cs-137 (Bq/m^2)
 >"landuse_co" landuse classification code by the National Land Numerical Information (MLIT, 2017; http://nlftp.mlit.go.jp/ksj-e/index.html). 10=paddy field, 20=other farmland, 50=forest, 60=Wasteland, 70=buildings, 91=road, 92=railway, 100=other, 110=river and lake, 140=beach, 160=Golf, 0=unclassified

[Reference material]
Kato, H., Onda, Y., (2018) Determining the initial Fukushima reactor accident-derived cesium-137 fallout in forested areas of municipalities in Fukushima Prefecture. Journal of Forest Research 23(2), 73-84. DOI: 10.1080/13416979.2018.1448566.