NDLI: Planarity and Street Network Representation in Urban Form Analysis

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Planarity and Street Network Representation in Urban Form Analysis

Content Provider	Scilit
Author	Boeing, Geoff
Copyright Year	2018
Description	Journal: SSRN Electronic Journal Models of street networks underlie research in urban travel behavior, accessibility, design patterns, and morphology. These models are commonly defined as planar, meaning they can be represented in two dimensions without any underpasses or overpasses. However, real-world urban street networks exist in three-dimensional space and frequently feature grade separation such as bridges and tunnels: planar simplifications can be useful but they also impact the results of real-world street network analysis. This study measures the nonplanarity of drivable and walkable street networks in the centers of 50 cities worldwide, then examines the variation of nonplanarity across a single city. It develops two new indicators - the Spatial Planarity Ratio and the Edge Length Ratio - to measure planarity and describe infrastructure and urbanization. While some street networks are approximately planar, we empirically quantify how planar models can inconsistently but drastically misrepresent intersection density, street lengths, routing, and connectivity.
Related Links	http://arxiv.org/pdf/1806.01805 https://papers.ssrn.com/sol3/Delivery.cfm?abstractid=3191236
ISSN	10914358
e-ISSN	15565068
DOI	10.2139/ssrn.3191236
Journal	SSRN Electronic Journal
Language	English
Publisher	Elsevier BV
Publisher Date	2018-06-05
Access Restriction	Open
Subject Keyword	Journal: SSRN Electronic Journal Transportation Science and Technology Spatial Planarity
Content Type	Text
Resource Type	Article
Subject	Public Health, Environmental and Occupational Health Psychiatry and Mental Health

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