Preferential centrality - a new measure unifying urban activity, attraction and accessibility
Preprint, 2019

The fact that accessibility shapes the geographic distribution of activity needs to be addressed in any long-term policy and planning for urban systems. One major problem is that current accessibility measures rely on the identification and quantification of attractions in the system. We propose that it is possible to devise a network centrality measure that bypasses this reliance and predicts the distribution of urban activity directly from the structure of the infrastructure networks over which interactions take place. From a basis of spatial interaction modelling and eigenvector centrality measures we develop what we call a preferential centrality measure that recursively and self-consistently integrates activity, attraction and accessibility. Derived from the same logic as Google’s PageRank algorithm, we may describe its operation by drawing a parallel: Google’s PageRank algorithm ranks the importance of networked documents without the need to perform any analysis of their contents. Instead it considers the topological structure of the network and piggybacks thereby on contextualized and deep evaluation of documents by the myriad distributed agents that constructed the network. We do the same thing with regard to networked geographical zones. Our approach opens up new applications of modelling and promises to alleviate a host of recalcitrant problems, associated with integrated modelling, and the need for large volumes of socioeconomic data. We present an initial validation of our proposed measure by using land taxation values in the Gothenburg municipality as an empirical proxy of urban activity. The resulting measure shows a promising correlation with the taxation values.

transportation

Accessibility

centrality

spatial interaction

PageRank

spatial regression

Eigenvector centrality

preferential attachment

urban activity

land value

Författare

Alexander Hellervik

Chalmers, Rymd-, geo- och miljövetenskap, Fysisk resursteori, Fysisk resursteori 2

Leonard Carl Staffan Nilsson

Chalmers, Arkitektur och samhällsbyggnadsteknik, Stadsbyggnad

Claes Andersson

Chalmers, Rymd-, geo- och miljövetenskap, Fysisk resursteori

Towards comprehensive urban mobility models - integrating transport modelling and space syntax

Statens vegvesen, 2015-01-01 -- 2019-12-31.

Inducerade innovationskaskader och utformningen av nya hållbara processer for planering och policy: en studie med modellering och empiri av utvecklingen kring vägkorridorer

Formas, 2015-09-01 -- 2018-12-31.

Ämneskategorier

Samhällsbyggnadsteknik

Ekonomisk geografi

DOI

10.1177/2399808318812888

Mer information

Skapat

2018-12-18