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Erschienen in:
Introduction Kapitel lesen Erstes Kapitel lesen

2024 | OriginalPaper | Buchkapitel

4. The State of the Streets: Measurements of Connectivity in the Atlas of Urban Expansion

verfasst von : Patrick Lamson-Hall, Shlomo Angel

Erschienen in: Urban Inequalities from Space

Verlag: Springer International Publishing

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Abstract

Relatively little is known about the spatial organization of streets and roads in the world’s cities, the differences that exist across cities, or the differences that have emerged within cities over time. This chapter explores evidence from the Atlas of Urban Expansion – 2016 Edition, to investigate these questions, focusing on measures of road capacity and road connectivity. The analysis is based on a 200-city sample that was selected to represent the universe of 4231 cities with populations of 100,000 or more in 2010. Road network measurements were taken using an intra-urban sampling framework based on a Halton sequence of quasi-random analysis sites. Data was generated using manual digitization of satellite imagery, producing robust metrics but not resulting in complete land use or street maps of cities. Results show that street networks are becoming less orderly over time as newly developed areas of cities have narrower streets, fewer four-way intersections, and less access to arterial roads.

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Vorheriges Kapitel Detecting Inequalities from Earth Observation–Derived Global Societal Variables
Nächstes Kapitel Urban and Peri-Urban? Investigation of the Location of Informal Settlements Using Two Databases
Fußnoten
1
This is obviously not the only thing that cities do, but it is the thing that accounts for the tremendous productivity of cities (Becker et al. 1999). When the labor market functions well, it enables the other important cultural and social activities that, in fact, comprise the majority of life in a city.
 
2
The world regions were developed from standard geographic groupings used at the time by the United Nations Population Division but were modified to reflect observed similarities in urban population density among some geographically disparate places (i.e., Europe and Japan, or the decision to group the United States, Canada, Australia, and the New Zealand into the “Land Rich Developed Countries”).
 
3
Once we have filtered for infill growth in the pre-1990 area and inclusion growth in the expansion area.
 
4
This work was conducted by analysts at Valectus Ltd’s Urban Expansion Observatory in Navi Mumbai, India, under direct supervision of the Atlas authors.
 
5
Indeed, one contribution of the Atlas project was to dramatically increase the supply of training data for future machine learning efforts.
 
6
Decision tools and manuals are unpublished but available by request.
 
7
In AUE 2016, the words “streets” and “roads” are used interchangeably, and this metric is called “share of built-up area occupied by roads.” To reduce confusion, this chapter refers to locale-based metrics as “streets” and only arterial roads as “roads.”
 
8
Actually, the metric four-way intersections consists of all intersections greater than three-way.
 
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Metadaten
Titel
The State of the Streets: Measurements of Connectivity in the Atlas of Urban Expansion
verfasst von
Patrick Lamson-Hall
Shlomo Angel
Copyright-Jahr
2024
Buch
Urban Inequalities from Space

Print ISBN: 978-3-031-49182-5

Electronic ISBN: 978-3-031-49183-2

Copyright-Jahr: 2024

DOI
https://doi.org/10.1007/978-3-031-49183-2_4

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