2003 Fiscal Year Final Research Report Summary
Construction, Management, and Development of Analytical Methods for Spatial Data and its Application
| Project/Area Number |
10202205
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Humanities and Social Sciences
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| Research Institution | NIHON UNIVERSITY |
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Principal Investigator |
KOHSAKA Hiroyuki Nihon University, College of Humanities and Sciences, Professor, 文理学部, 教授 (60092516)
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| Co-Investigator(Kenkyū-buntansha) |
KOIKE Shirou National Institute of Population and Social Security Research, Researcher, 人口構造研究部, 研究員
SEKINE Tomoko Nihon University, College of Humanities and Sciences, Assistant, 文理学部, 助手 (90297763)
ARAI Yoshio The University of Tokyo, Graduate School of Arts and Sciences, Professor, 大学院・総合文化研究科, 教授 (50134408)
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| Project Period (FY) |
1998 – 2003
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| Keywords | Accessibility / Shortest Path Search / Location Assessment / Evaluation Accuracy / Data Base for Mesh Population / Meiji Era / First Stage of Showa Era / Spatial Variation in Population |
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| Research Abstract |
In the first study, accessibility is measured from residential districts (Cyocyo-aza) to ophthalmic clinics in Matsudo City, Chiba Prefecture. To measure the accessibility at finer level, the one kilometer mesh constructed in Basic Area Mesh System is divided into ten equal segments for each side to create 100m mesh. The shortest path distance to the clinics is measured from the centroids of six thousand and eighty nine 100m meshes constituting Matsudo City. To examine spatial variation in accessibility within all residential districts of Matsudo City, the accessibility map at district level was intersected with one at 100m mesh level. It became clear that thirty to forty percentages of meshes have different accessibility levels from one measured at district level. The degradation of accessibility level, in other words, the rate at which spatial analysis at the district level over-assesses, amounts to 15% to 33%.
In the second study, population distribution data for four points between 1890 and 2000 were estimated from old-time topographical maps in Japan using GIS. It became clear that the area of ten kilometer zone from the center of Tokyo experienced drastic population growth between 1890 and 1930 and the surrounding area to the center of Tokyo dropped the population density between 1930 and 1970. In addition, the central place system was changed from one based on railway network to one based on road network between 1890 and 1930.
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