Morphological Study on Three-dimensional Gap between Buildings in Urban Space

城市空间建筑三维缝隙形态研究

基本信息

批准号：
18560617
负责人：
OIKAWA Kiyoaki
金额：
$ 1.5万
依托单位：
Ritsumeikan University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2006
资助国家：
日本
起止时间：
2006 至 2007
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560617/
关键词：
Gap between Buildings Building Location Morphology Three-dimensional Sphere Sweeping Method Closing Digital Image Processing Densely Built-up Area 球掃過密集

项目摘要

The purpose of this study is to propose a method of quantification of the gap between buildings, which is one of features in Japanese urban space, and to clarify the characteristics of volume, area and distribution pattern of these gaps.The three-dimensional gap was defined as volume where a sphere of radius r cannot sweep through on a three-dimensional building location map. The diameter of the sphere stands for the width of a gap. To extract the gap-volume operations in image-processing method called erosion and dilation were applied and developed. That is, after digital imaging of a three-dimensional building location map, building volume were dilated in terms of a digital figure corresponding to a sphere of rand then eroded. This procedure is equivalent to a dosing operation in morphology and enabled the extracting gaps. We call this method "Sphere Sweeping Method".The following results were obtained by applying this method to the building location of Kyoto city.1) The ratio of gap projected to horizontal area (gross area ratios) at three different widths of gap is 0.4% at 1.5m width, 1.2% at 2.5m, and 2.2% at 3.5m.2) The gap ratios and index of density (building density, perimeter-ratio, building coverage) are con-elated.3) The ratio of three-dimensional gap to the whole volume of buildings at three different widths of gap is 1.5% at 1.5m width, 4.1% at 2.5m, and 7.0% at 3.5m. Therefore the quantity of gap cannot be neglected in urban area.

这项研究的目的是提出一种量化建筑物之间差距的方法，这是日本城市空间中的特征之一，并阐明了这些缝隙的数量，面积和分布模式的特征。三维差距被定义为半径radius r radius r在三维建筑位置映射上无法扫描的体积。球体的直径代表了间隙的宽度。在图像处理方法中提取空隙 - 体积操作，称为侵蚀和扩张。也就是说，在三维建筑位置图的数字成像之后，建筑物的体积被扩散到与当时侵蚀的兰德球体相对应的数字图。此过程等于形态学的剂量操作，并实现了提取空白。 We call this method "Sphere Sweeping Method".The following results were obtained by applying this method to the building location of Kyoto city.1) The ratio of gap projected to horizontal area (gross area ratios) at three different widths of gap is 0.4% at 1.5m width, 1.2% at 2.5m, and 2.2% at 3.5m.2) The gap ratios and index of density (building density, perimeter-ratio, 3）三维差距与三个不同宽度宽度宽度的整个建筑物的比率为1.5％，宽度为1.5％，4.1％为2.50万，在3.5m时为7.0％。因此，在城市地区不能忽略差距的数量。