Map, Journal of the Japan Cartographers Association
Online ISSN : 2185-646X
Print ISSN : 0009-4897
ISSN-L : 0009-4897
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Volume 48, Issue 1
Displaying 1-7 of 7 articles from this issue
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Original Article
  • A Study of Map Information for Evacuation Navigation in Flood
    Kazuo OKAYAMA, Seiichi TANIOKA, Tsutomu TAKINAMI, Hiroyuki TAKAMATSU
    2010 Volume 48 Issue 1 Pages 1-16
    Published: 2010
    Released on J-STAGE: November 07, 2015
    DOIhttps://doi.org/10.11212/jjca.48.1_1
    JOURNAL FREE ACCESS
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    Information on flood risk and evacuation such as flood hazard map has been enhanced by revising of the flood fighting law. However, victims by flood are increasing. To improve the situation, authors examined how to provide river authorities’ information to local governments and residents comprehensibly and effectively.
    As a result, it is proposed to distribute “Flood Navigating Information” which consists of “Risk Information Map” and “Evacuation Assessment Map”. The “Risk Information Map” indicates fluid power of the flood and inundation period as well as inundation depth. The map has three types. One shows inundation area due to flood from entire control section of the river. Another shows area from specific section consists of break points having similar inundation area. The other shows area from a specific point of possible dike collapse. Provisional situation of the three types standardized corresponding to the flood levels and dike condition. The “Evacuation Assessment Map” shows decision-making procedure of evacuation by each building condition and includes supplementary information for the decision.
    Case studies of the “Flood Navigating Information” are conducted in two cities recently damaged by floods and effectiveness of the information is confirmed. Moreover, it becomes clear that followings are indispensable for effective use of the information - Preparation of the information prior to floods by local governments and residents are useful to understand the flood risk of the region, - A manual of the information use is necessary for local governments which apply the information for evacuation orders and have to explain the reasons to the press. - The information corresponding to inundation due to interior runoff is also necessary, - The evacuation judgement of each house should be carefully achieved according to the local community condition. - Prompt information transmission means are necessary to practical use of the information.
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Research Notes
  • Geographic Information Systems for Identifying Areas with a Risk of Redback Spider Bites in Osaka Prefecture
    Naoko NIHEI, Osamu KOMAGATA, Mutsuo KOBAYASHI, Masahiro YOSHIDA, Masat ...
    2010 Volume 48 Issue 1 Pages 17-23
    Published: 2010
    Released on J-STAGE: November 07, 2015
    DOIhttps://doi.org/10.11212/jjca.48.1_17
    JOURNAL FREE ACCESS
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    The rapid increase in the incidence of redback spider bites has highlighted the need to identify areas with a risk of bites in order to implement effective pest control. We have been conducting redback spider distribution surveys in public areas and residential districts since 1995, when the introduction and establishment of redback spider populations in Osaka Prefecture were confirmed. The data on the number of collected female spiders obtained in these surveys were categorized according to town/street, year, and residential estate. Geographic information systems were used to develop a distribution map showing the range of habitation, status of dispersal, and habitation density of these spiders. We also developed a distribution map showing the incidence of biting cases by redback spider from the time they were first discovered through 2008.
    Superimposition of this map over the redback spider distribution map showed that the incidence of spider bites was high in areas where the spider populations have long been established, and that spider bites were also occurring where the population have increased over the past few years.
    Assessment of the relationship between habitation density and spider bite incidence revealed that the incidence is higher in town/streets from where more than 101 spiders were collected, and also even in residential estates from where more than 2 spiders per 1,000 m2.
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  • [title in Japanese]
    [in Japanese]
    2010 Volume 48 Issue 1 Pages 24-25
    Published: 2010
    Released on J-STAGE: November 07, 2015
    DOIhttps://doi.org/10.11212/jjca.48.1_24
    JOURNAL FREE ACCESS
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