GIS-理論と応用

安定地点を考慮した土地利用遷移予測モデル

大佛俊泰, 倍田賢一

1996 年 4 巻 2 号 p. 1-6
発行日: 1996/08/31
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.4.2_1

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Many studies on land-use transition have been carried out using a Markov chain model. Its transition probability matrix on land-use is usually estimated from current or historical data in the study area. In this process it is assumed that every place in the area is changeable following to the Markov chain process. However, there are some places whose land-use is in steady state. In this paper we propose a method for estimating the transition probability considering the existence of such steady places. Also effectiveness of this method is examined by numerical examples.

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効用概念に基づく土地利用遷移確率モデルの構築とその応用

大佛俊泰, 栗崎直子

1996 年 4 巻 2 号 p. 7-14
発行日: 1996/08/31
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.4.2_7

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In this paper a stochastic model is proposed for describing the property of land-use transition. Although the application of a random bid-price theory to land-use model is by now fairly familiar, this paper develops a new method to estimate a bid-price utility function using the land-use transition matrix. One advantage of this method is that the parameters can be estimated using a multiple regression analysis with ease. It is, also, possible to obtain not only the bid-price utility of each land-use at each place, but also the effects of a change of the land-value or investment costs on the transition probability. The numerical examples using the actual land-use data are shown to inspect the effectiveness of the proposed model.

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簡易型differential GPSの開発と実用性の検討

富田邦裕, 松山洋

1996 年 4 巻 2 号 p. 15-28
発行日: 1996/08/31
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.4.2_15

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A portable and inexpensive semi-differential GPS is developed. Some investigations are carried out for its practical use. The total weight of this system is about 500g including GPS receiver, data logger and their interface which can be easily taken out to field experiments. It costs only 150, 000 Japanese yen for a series of development which is as one tenth to one hundredth as the presently available differential GPS. With this system, relative positions from a fixed reference station can be measured within ±3 m as a root mean square difference, which is as accurate as the operational ones. The measured positions can be plotted on a computer map if a topographical or a digital map is available. This system is fully practical, for example, for getting ground truth data of a remote sensing or for developing a car navigation system in a town.

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国土地理院の数値地図整備

村上真幸

1996 年 4 巻 2 号 p. 29-34
発行日: 1996/08/31
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.4.2_29

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The Geographical Survey Institute (GSI) has been developing various kinds of digital geographic data since 1974 when the development of National Land Information System was initiated. In 1993 GSI began to place a series of digital data on the market. This report describes the development and the publication of the data by GSI as well as the activities on the standardization of geographic information.

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タイ王国における地理情報システムの都市計画への利用状況

寺木彰浩

1996 年 4 巻 2 号 p. 35-40
発行日: 1996/08/31
公開日: 2009/05/29

DOIhttps://doi.org/10.5638/thagis.4.2_35

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This paper deals with a survey concerning Geographic Information System(GIS) for Urban Planning in Thailand. The survey was done for Department of Town and Country Planning(DTCP), Bangkok Metropolitan Agency, Chulalongkorn University. The result shows that GIS for urban planning prevails in Thailand like in Japan and GIS data will be open to the public in future.

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