A viewshed approach on identifying the street spatial outline

Ziyu Tong
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引用次数: 2

Abstract

The street space plays an important role in urban fabric studies. However, it's difficult to draw continues contour line of the street space because of the gaps between the dispersed buildings, especially in China cities. The paper developed a new method to extract the street spatial outline and indentify the perceptible street space with the cumulative viewshed analysis in GIS. Through the cases study of the sample streets of seven typical cities chosen from US, Europe and China, the visibility of every pixel of the sample streets was calculated with cumulative viewshed analysis. With the threshold which was set based on the statistics analysis, the street spatial outline was extracted and the street space was identified. The results show the new method for identifying the street space is effective. The extracted street space reflected the characteristics of spatial form and presented a new concept to study urban fabric.
一种识别街道空间轮廓的视角方法
街道空间在城市肌理研究中占有重要地位。然而,由于分散的建筑之间的空隙,很难绘制出连续的街道空间等高线,特别是在中国的城市中。提出了一种在GIS中利用累积视场分析提取街道空间轮廓并识别可感知街道空间的新方法。通过对美国、欧洲和中国七个典型城市的样本街道进行案例研究,采用累积视场分析法计算样本街道每个像素的可见度。在统计分析的基础上设置阈值,提取街道空间轮廓,识别街道空间。结果表明,该方法对街道空间的识别是有效的。提取的街道空间反映了空间形态的特征,为研究城市肌理提供了一种新的概念。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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