GIS-理論と応用

関東平野南部における都市気温分布の時空間構造解析

平野勇二郎, 茅陽一

1998 年 6 巻 2 号 p. 1-10
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_1

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This paper aims to analyze the spatio-temporal structure of urban air temperature distribution in the southern part of Kanto Plain using GIS. Temperature is affected by many factors such as the ocean, land cover and topography. To estimate the contribution of the each factor statistically, multi-regression analysis is applied to air temperature data (1984-1993) of 96 meteorological stations in the study area. From the diurnal and seasonal variations of the estimated coefficients of those factors, spatio-temporal structure of the air temperature distribution is revealed. Finally, urban heat island phenomena in the daytime and nighttime is visually demonstrated using pixel-field data of air temperature generated based on the results of multiple regression analysis.

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GIS-Aided Benefit Evaluation System for Urban Railway Improvements : Focusing on the Hedonic Approach

Myoung Young PIOR, Eihan SHIMIZU, Hideo NAKAMURA

1998 年 6 巻 2 号 p. 11-22
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_11

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This study specially focuses on the hedonic approach to evaluate the benefits of urban railway improvements. In the GIS environment, the information for the hedonic approach can be efficiently collected and generated. A unique conditions unit that is useful to statistical analysis can be easily generated by the overlay function. The benefits can be estimated in real locations undertaking improvement gains. With such advantages, "GIS-Aided Benefit Evaluation System" has been developed as a flexible and useful tool for supporting the hedonic approach in this study. As mathematical methodologies for the hedonic approach, the Box-Cox functional form that avoids prior restrictions is adopted to determine the best hedonic land price function. The general inverse matrix is also used to cope with multi-collinearity associated with the hedonic price function. The potentiality of the proposed system for practical application has been verified by application to the Joban New Line.

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拡張ボロノイ線図を用いた等高線画像の大局的復元処理

渡辺孝志, 山本善一, 阿部英志, 木村彰男

1998 年 6 巻 2 号 p. 23-31
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_23

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It has been strongly requested to get automatically a precise digital elevation model from a topographic contour image. But, because of overlapping other symbols, the image usually includes many broken contours. To connect these correctly, a global restoration technique considering states of adjacent contours is needed. In this paper we propose a new global restoration method using an extended Voronoi diagram that produces a relationship graph of adjacent contours. Based on an idea of reference contours, it determines pairs of broken contours to be connected and interpolates their gaps with spline curves. It can satisfactorily restore broken contours that have been considered difficult to connect.

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小縮尺表示時に建築物形状を構成する線分が失われる確率

寺木彰浩

1998 年 6 巻 2 号 p. 33-39
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_33

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This paper deals with vector to raster conversion. Segments of buildings are lost on maps at small scales. It comes from raster output devices. This paper proposes a model of segments on raster devices and estimates the probability of lost segments. Then it calculates the probabilities for 1-ken (Japanese traditional unit of length) and data of buildings in Hyogo Prefecture. The result shows that the current standard of map drawing needs revises for the use of urban planning.

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イントラネット型地理情報システムの構成に関する考察

松本裕, 大沢裕

1998 年 6 巻 2 号 p. 41-48
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_41

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This paper discusses intranet geographic information systems. On intranet GIS, computer environments (including operating system, machine architecture, implementation language), role share between server and client, the method to know the place the necessary data existing, file input and output on a local file, are important. In this paper, we discuss these technical problems. To know the server computer which possesses requested data, we propose a mechanism similar with DNS (domain name system). We have developed an intranet GIS to be used on WWW browsers by using plug-in method and ActiveX.

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都市空間情報の3次元表示方法に関する研究

衣袋洋一

1998 年 6 巻 2 号 p. 49-56
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_49

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The method of information processing, which treats the plane and large area data by GIS, is not used for architectural designing that chiefly treats architectural and human scale data for area planning and redevelopment planning. In large area design based on much information of processing, we need three dimensional and narrow space information system made of data of architectural scale. The development of method that bridges between GIS and this system is desirable. The purpose of this study is to examine the effectiveness of the visual method of the three dimensional meshmap which we have tackled since 1992 and to verify its efficacy as a method to analyze spatial composition.

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GISを利用した開放型災害情報システムの設計と実装

西村知也, 浦本祐次, 中田幸男, 田中克己, 北村新三

1998 年 6 巻 2 号 p. 57-64
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_57

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This paper discusses an information system for disaster prevention using a GIS. The information system gets a lesson from HANSHIN-AWAJI earthquake disaster. This system quickly collects information about disasters and provides official information for citizens and organs of a city. Advantages of this system are the following. The user-friendly interface: Citizens can easily operate this system. They can access to this system from their houses or offices, etc. This system visually shows disaster information using GIS on a WWW browser. The effective data structure: This system registers disaster information in the data structure. We can reduce the data size of disaster information by the data structure. The portability: The main part of this system is independent of GIS.This system provides a general interface using CORBA. This system can easily connect with any GIS by the general interface.

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学校教育におけるGIS利用

アメリカ合衆国の動向とわが国の可能性

伊藤悟, 井田仁康, 中村康子

1998 年 6 巻 2 号 p. 65-70
発行日: 1998/09/15
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_65

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The use of Geographic Information Systems (GIS) in elementary and secondary school education has come to be paid attention to in recent years. In this paper, we attempt to discuss this use from two viewpoints. The first is from recent trends in the United States, where we can find many examples of GIS use in K-12 education. The other is from the possibilities of GIS within the Japanese educational system.

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論文の訂正

1998 年 6 巻 2 号 p. 72
発行日: 1998年
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.6.2_72

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