Planning and Design of Urban Green Environment Assisted by Integrated Spatial Information System

调查组长利用GIS和CAD/CG构成的综合空间信息系统，对淀川下游卫星城市的城市绿色环境进行了调查。通过建立绿色环境数据库，找出其逐年变化情况，并将现有的绿色与绿色总体规划进行比较。在此基础上，开发了在三维空间中呈现绿色总体规划的新方法。具体而言，根据大坂府丰中、平方、高筑三个城市的各自特点，开发了绿色环境的规划支援系统。然而，通过遥感分析的绿色环境数据库覆盖了所有三个城市的全市范围。为了定量地确定丰中市绿色环境的形态，进行了空间自相关分析中的JOIN统计分析。为评价绿色环境质量提供了新的指标。以平方市为例，他利用从机载LIDAR（光探测和测距）数据生成的DSM（数字表面模型），通过能见度分析求出了绿色可视面积比。为定量、高效地评价绿色的视觉效果提供了一种新的方法。他开发了另一种新方法，通过使用体素空间使三维绿色空间可视化，分析了绿色的视觉效果。他还分析了高月市以水和绿色为重点的河流景观。根据能见度分析结果，计算了可见光下土地覆盖分类率。然后，他提出了一种新的方法来构建三维城市模型，通过利用机载激光雷达数据与各种空间数据，如DM（数字地图）数据，航空正射照片和卫星图像。在这个过程中，他完成了绿色环境的三维呈现方法。

The head investigator has been investigating the urban green environment in the satellite cities in the lower reaches of the Yodo River by using the integrated spatial information system made up of GIS and CAD/CG. He found its yearly changes with making the database of green environment, and compared the existing green with the green master plan. And he has been developing a new method to present the green master plan in 3-D space.Concretely, he developed the planning support system for the green environment according to each charactetistic of three cities, Toyonaka, Hirakata and Takatsuki, in Osaka Prefecture. However, the database of green environment analyzed by remote sensing was covering the citywide area of all three cities. The JOIN statistical analysis, one of spatial auto-correlation analyses, was done to fix the form of the green environment quantitatively in Toyonaka City. It gave us new indices to evaluate the quality of the green environment. In the case of Hirakata City, he found the green visible area ratio with visibility analysis by using the DSM (digital surface model) generated from the airborne LIDAR (light detection and ranging) data. It gave us a new method to evaluate visual effects of green quantitatively and efficiently. He developed another new method to analyze the visual effects of green by making the 3-D green visible space with voxel space.He also analyzed the riverscape focusing on water and green in Takatsuki City. The ratio of land cover classification in sight was calculated according to the result of visibility analysis. Then, he proposed a new method to construct 3-D urban models by utilizing the airborne LIDAR data with various spatial data such as DM (digital map) data, aerial ortho-photos, and satellite images. In this process he completed the method to present the green environment three-dimensionally.