Three Dimensional Land Use and Residential Function in The High Density and Mixed District.

(1)利用计算机图形学技术，建立了城市中心区土地利用三维分析数据库系统。(2)我们调查了大分市中心地区的建筑楼层使用情况（三维土地使用）。在大分市中心地区有14，000个土地使用单位。建立了城市中心区三维土地利用数据库。(3)我们计算了每层楼的建筑面积，然后就清楚了三维土地是如何使用的。利用C语言对土地利用进行了三维可视化表示。G.法(4)通过土地利用密度指标和土地利用混合指标来把握城市中心区的土地利用状况。将104个土地利用编码重新划分为29个分区，并定期移动一个圆形区域计算一个圆形区域内的密度指标。结果，城市中心区的密度构成变得清晰，并且与使用区域有很大的关联。采用辛普森指数的混合指数也是如此。(5)了解29个土地利用分区之间的混合关系。G.在住宅和商业之间），我们假设一个圆的中心是每个土地使用单位。通过计算这些地区的二次半径，探讨了土地利用分区（即土地利用分区）之间的关系。e.混合物的条件）变得清楚。结果，我们知道，相同的土地使用分区彼此接近，几乎所有的土地使用分区都接近住宅。(6)分析了居民意识与密度指标和混合指标的关系。研究结果表明，商业用地的影响大于居住用地的影响。

(1) We made a database system to analyze three dimensional land use in a city center area using computer graphics.(2) We investigated the usage of building floors (;the three dimensional land use) in the center area of Oita city. There were 14,000 units of land use in the city center area of Oita city. Then we made the database of three dimensional land use of city center area.(3) We totalized the floor area of each stories, then it became clear that how the three dimensional land was used. And we represented the three dimensional land use visually by C. G. method.(4) We grasped land use in the city center area by a density indicator and a mixture indicator of land use. The codes of land use that was subdivided 104 codes was re-parceled out into 29 divisions, and a density indicator in a circle area was calculated regularly shifting a circle area regularly. As the result, a density constitution in the city center area became clear, and it was greatly associated with the use district. And the mixture indicator using Sympson's index was likewise.(5) To understand mixture relationship between 29 land use divisions (e. g. between residence and commerce), we supposed an circle with the center which was each land use unit. By calculating radiuses of second degree in those areas, approach relationship between land use divisions (i. e. a condition of mixture) became clear. As the result, we knew that the same land use division approached with each other and almost land use divisions approached residence similarly.(6) We analyzed the relationship between inhabitants' consciousness and a density indicator and a mixture indicator. As the result, we knew that the commercial land use exert more influences than residential land use.