Analytical Model for Visibility on Landmarks and Open Spaces

本计画从景观的观点，探讨地标与开放空间的量化评估方法。第一部分考察城市地区的标志性建筑，如城堡、教堂、钟楼、高楼、大山和大树。该项目在城市环境中开发了一个简单的分析模型，以研究建筑高度和密度如何影响地标可见区域。从视点的可见性的概率将通过使用更新过程来导出。第二部分探讨城市夜景。在第一种方法中，我们提出了一个程序来测量立体角的夜景。在第二种方法中，我们定义了一种技术来计算从给定视点可见的道路。基于这两种方法，我们分析了函馆从1975年到2000年每五年的夜景

This project examines the quantitative methods to evaluate landmarks and opens space from the viewpoint of landscape. The first part examines landmarks in an urban area, such as castles, churches, bell towers, tall buildings, great hills and tall trees. This project develops a simple analytical model within an urban setting to examine how building height and density affect the area from which the landmark is visible. The probability of visibility from viewpoints will be derived by use of a renewal process. The second part explores urban nightscape. In the first method we present a procedure to measure the solid angle of a nightscape. In the second method we define a technique to count the roads, which axe visible from a given viewpoint. Based on these two methods, we analyze a nightscape in Hakodate from 1975 to 2000 at five-year intervals