How to use the database

1. How to Use the DVD-ROM

The English opening screen automatically opens the file ‘index_eng.html’ from the disk. There are two search portals on the English opening screen, from which users can choose:

  • “Search from a list of Volcanic Hazard Maps”
  • “Search by Volcano Location Map”

For Google Earth, we have experimented with providing location information on active volcanoes in Japan by using a KML (Keyhole Markup Language) Network Link. In every case, the user finally arrives at the “List of Database on Volcanic Hazard Maps and Reference Material.”

A digital image file for screen browsing can be opened by selecting and clicking on a hazard map or a reference material from the list in the ‘Name of hazard map / Reference material’ column. The resolution of data files for printing is about 300–400 dpi. Some maps and references have no separate data files for printing, either because they were not available or because we needed to save on disk capacity. On the opening screen there are also links to regional disaster prevention plans and volcanic disaster prevention plans.

2. “List of Database on Volcanic Hazard Maps and Reference Material”

The methods used to organize the maps and reference materials and the definitions of the terms in the “Name of hazard map / Reference material” list are described below.

2.1 Organization of maps and reference materials

1. Hazard maps and reference materials
In the database, published hazard maps and disaster prevention maps, regardless of their form (e.g. maps or booklets) are collectively called hazard maps (HMs). Explanatory and related materials and trial HMs are collectively called reference materials (RMs).

2. Whole and regional editions
Because most volcanoes (except e.g. those on small islands) extend across municipal borders, volcanic HMs are often prepared by two or more municipalities and relevant institutions through mutual collaboration. Therefore, there are various kinds of volcanic HM, even for a single volcano. In this database, HMs and RMs are classified into whole and regional editions. The whole editions aim at the residents in all municipalities subject to hazards posed by the volcano, whereas the regional editions aim at some municipalities. For example, HMs and RMs that provide information on evacuation centers, publishers, and emergency points of contact mainly in a single municipality are classified as regional editions, even though the hazardous area may be relevant to all municipalities.

3. Versions
Some HMs and RMs have the same titles and formats but differ slightly in content. In this database, such HMs and RMs are regarded as:

  • separate HMs or RMs when they differ in content such as year of publication, contact address, and authorization number from the Geospatial Information Authority of Japan—regardless of the version numbers, which may be identical
  • the same HM or RM when they differ in terms of only the year of issue, not the contents, and the publication year of the first edition is cited in second and subsequent editions as the original year of issue
  • In the case of HMs or RMs reprinted because of a misprint, only the correct version is included in the database

4. Naming of files
The files have been named in the following manner:

  • Example: \05atosa_1h01-H.pdf
    • [Volcano ID + name of the volcano]_[1: whole; 2: regional][h: hazard map; m: reference material][two-digit serial number] -[L: low resolution, H: high resolution]

2.2 Order in which HMs and RMs are arranged

  1. In the “Name of hazard map / Reference material” list, HMs and RMs are arranged in order of volcano number. The volcano numbers and names in the list are based on the “National Catalogue of the Active Volcanoes in Japan, 4th Edition” (Japan Meteorological Agency, 2012). The rank of volcanic activity is based on the “National Catalogue of the Active Volcanoes in Japan, 3rd Edition” (Japan Meteorological Agency, 2005).
  2. For each volcano, HMs and RMs are arranged in order from the whole to the regional editions. In each class of information, HMs are listed first and then RMs.
  3. RMs and HMs of the same edition type are each arranged in the reverse chronological order in which they were published.
  4. If there are two or more regional editions for a single region, the HMs and RMs are arranged in the order of the relevant publisher, i.e. from national, through prefectural, to municipal governments. HMs and RMs published by different municipal governments are placed in random order.
  5. Reference numbers were newly assigned for this second edition of the database and are different from those in the first edition.

2.3 Explanation of columns

  1. Common: Description in parentheses indicates information not shown in the original text but added in the second edition for clarification.
  2. Regions: Japan is divided into four blocks: Hokkaido, Tohoku, Kanto and Chubu, and Kyushu. Volcanic hazard maps have not been prepared for other regions.
  3. Volcano number and name of volcano: Based on the “National Catalogue of the Active Volcanoes in Japan, 4th Edition” (Japan Meteorological Agency, 2012)
  4. Rank (Rank of volcanic activity): Based on the “National Catalogue of the Active Volcanoes in Japan, 3rd Edition” (Japan Meteorological Agency, 2005)
  5. Name of hazard map/Reference material: The file you wish to browse will open when you click on the name of the HM or RM.
  6. Pagination: Information on pagination for reassembling separately scanned image sections (if any) into an entire image is displayed below the name of the HM or RM. Please see “Notes for printing,” which can be reached via a link on the opening screen, for methods of image reassembly.
  7. Size and/or kind of reference material: Indicates the original size and/or form of the reference material.
  8. Kind of materials: Expressed as a combination of a number and a letter, i.e. 1: entire edition or 2: regional edition + h: hazard map or m: reference material.
  9. File size for print: Represents the size of the file in Mb, with resolutions of 300–400 dpi. The file size is prefixed with a ▼ mark if the file includes images at resolutions below 300 dpi. Files for which resolution is unidentified are marked with △, showing that printing quality is not guaranteed.
  10. Publisher/reference: If the publisher or reference has their own website, click on the publisher/reference column to access the website.
  11. Date of publication: The notation of the date of the publication has been standardized by using the Western calendar. If the date of publication is not written on the HM or RM, “not written” is shown in the column and any additional information or materials obtained from the publishers by our clerical staff is added in parentheses.
  12. Explanation of volcanic alert levels: A link is provided to a leaflet on volcanic alert levels on the website of the Japan Meteorological Agency.

Cautions in printing

Large-size reference materials including hazard maps split into sections for scanning, and the size of materials

Cautions in printing

printing method

Some of the large-size materials in the database by the Volcanological Society of Japan are split into sections for scanning. (A single material is split by information for scanning.) The size of the PDF file may differ from that of original reference material even though the PDF is seen in the same size in browsing. For example, A0-size reference material is split into one A1-size map, one A3-size map and six A4-size pieces of information for scanning.

In addition, in the case of original information in the form of a booklet, scanned images may include the size of the original material, the size of two-page spread, and a mixture of the two sizes.

In this case, because the size and orientation of each page may vary, be careful in printing the pages.

To print the PDF file on the same paper size, select "Print" from the "File" menu, set "Page Scaling" in the "Page Handling" group of settings to "Fit to Printer Margins," and check the "Auto-Rotate and Center" box.

To print the PDF file on the original size, set the "Page Scaling" to "None" and uncheck the "Auto-Rotate and Center" box.

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Sakurajima and the innermost part of Kagoshima Bay (taken by Minami-Nippon Shimbun on 22 April 2013)