Theory and Applications of GIS

Land-use Forecasts Considering the Existence of Steady-state Places

Toshihiro OSARAGI, Kenichi MASUDA

1996 Volume 4 Issue 2 Pages 1-6
Published: August 31, 1996
Released on J-STAGE: May 29, 2009

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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A Utility Model of Land-use Transition Probability and Its Application

Toshihiro OSARAGI, Naoko KURISAKI

1996 Volume 4 Issue 2 Pages 7-14
Published: August 31, 1996
Released on J-STAGE: May 29, 2009

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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Development and Investigations of Semi-Differential GPS

Kunihiro TOMITA, Hiroshi MATSUYAMA

1996 Volume 4 Issue 2 Pages 15-28
Published: August 31, 1996
Released on J-STAGE: May 29, 2009

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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Geographic Data Development by the Geographical Survey Institute

Masaki MURAKAMI

1996 Volume 4 Issue 2 Pages 29-34
Published: August 31, 1996
Released on J-STAGE: May 29, 2009

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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Geographic Information System for Urban Planning in Thailand

Akihiro TERAKI

1996 Volume 4 Issue 2 Pages 35-40
Published: August 31, 1996
Released on J-STAGE: May 29, 2009

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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