Let’s Get Started

Top page displays contents such as air dose rate and radioactive concentration.

• Display information about this site.
• Selecting a content takes you to the contents page, which displays the measured data for the selected content. Click to display a description of each content.
• Display histories about this site.
• Display description about this site.

When you move to the contents page, the search condition panel will appear. Select the measured period and measured item for the data you wish to display on the map and click Render Map.

• Changing large classification will take you to another contents page.
• Selecting a middle classification allows you to select all measured items included the selected middle classification.
• Select the measured period from the pull-down or slider. You can select a period of up to one year.
• Select measured items you wish to display on the map. Click to display the details of each measured item.

The measured data is displayed on the map in the form of a mesh or points, depending on the content.

Clicking the reload button after moving the map will update the map with the measured data.

Clicking on a mesh or point displays a popup with details of the measured data.

The popup displays the mesh code, reference date, measured value and measured items of interest. If the reference date is a period, it means that the selected data contains several data with a reference date with that period.

Select a measurement point (mesh or point) displayed on the map and click detailed data button to display the measured data for the selected measurement point in the graph or table.

Open the time change graph or depth distribution graph tab in the detailed data panel to graphically display the measured data for the measurement point selected on the map.

Graphs are displayed as time change graphs or depth distribution graphs² depending on the content. Up to 6 measurement points can be selected for graph display.

• Turning on the “Y-Axis Logarithmic” and “X-Axis Logarithmic” will change the vertical and horizontal axes of the graph to be displayed in logarithmic form.
• Clicking the PNG output button in the graph will download the displayed graph in PNG format.

Selecting the measured data table tab in the detailed data panel displays a table³ detailing the measured data selected on the map.

• If you specify a date for the physical reduce and click the Calculate button, a value that takes into account the physical reduce at the specified date⁴ from the measured date values will be displayed to the right of the value column in the table.

You can download the measured data selected on the map from upper right buttons on the detailed data panel in CSV, KML and SHP format. The CSV files are encoded in Shift_JIS.

Click the map button to display the map panel.

• Turn on automatic data update to automatically update the measured data after the map is moved.
• Turning on range selection allows you to select measurement points (mesh or points) by range. Clicking Deselect All button will deselect the measurement points.
• When the map is moved, the longitude and latitude are automatically updated to the center of the map. If you set the longitude and latitude and click Move button, the map will move the position where the specified longitude and latitude is centered.
• When the button is clicked and allow access to location information, a marker is plotted at the current location on the map and the longitude and latitude values are updated to the current location. Note that there may be errors in the location information acquired due to device conditions.
• The map display can be changed.
• The map can be printed.
• Click the Make Link button to create a URL for the displayed map.

• Longitude and latitude can be obtained from place names and landmarks. Place name search can only be performed in Japanese language. This function is created using the Geographical Survey Institute API. Excessive access will be restricted, so please refrain from using the function to search a large number of locations.
• When you select a search result link, a marker is plotted at the selected location on the map and the map will move so that the selected location is at the center.

Open map control tab on map panel.

You can switch the base map by selecting from five types: Standard map, Pale color map, Blank map, Aerial photo image and English.

When the graticule is turned on, grid lines of longitude and latitude are displayed on the map. The range of the grid lines changes as the map is zoomed in and out.

When the mini map is turned on, a mini map is displayed to confirm the current location in a wide area.

Open map control tab on map panel.

Clicking the Print Page button takes you to a page where you can print the map.

The print page allows PDF output, PNG output and printing at the specified page size.

You can display geographic information on the map you are viewing. To display geographic information on a map, open the layer tab in the map panel.

If you check the areas where returning is difficult, the areas will be indicated on the map with a shaded blue box.

Select elevation, vegetation, land-use, accumulated snow, soil, bathymetric, sediment and population to display the selected geographic information on the map.

If is displayed, zoom in on the map⁵ until it disappears.

Checking a junior high school or elementary school will display a landmark at the location of the school. Clicking on a landmark will display a popup with the name of the school.

The Search link in the header will take you to the detail search page.

• Select a large category from the pull-down menu.
• Select the period from the pull-down or slider.
• Select the air dose rate type or nuclide. If neither is checked, all will be searched.
• You can specify the measurement location by prefectures, municipality and mesh code.
• You can search for measured data by keywords.
• You can select measured items.
• Display the number of measured data corresponding to the selected criteria. If the number of items exceeds 200,000, please narrow down the search conditions before performing a search.
• Click Search to display the search results in the table.

• Select the measured data in the table and click Show on map button, then move the contents page and display the search results on the map.
• Click Download CSV button to download the search results in CSV format. The CSV files are encoded in Shift_JIS.

The Download link in the header will take you to the download by year page. The download by year page allows you to download measured data for each measured item by fiscal year.

• Select a large category.
• Select a middle category.
• Select the measured item for which you want to download the data by fiscal year.
• You can download the data by fiscal year.

• Select the character code of the CSV files.
• Click the link to download measured data by fiscal year in CSV format.
• Display a description of the selected measured item.