Space-time and integral measures of individual accessibility: a comparative analysis using a point-based framework
TLDR
In this paper, the authors compare the relationship and spatial patterns of these thirty accessibility measures using network-based GIS procedures and conclude that space-time and integral indices are distinctive types of accessibility measures which reflect different dimensions of the accessibility experience of individuals.Abstract:
Conventional integral measures of accessibility, although valuable as indicators of place accessibility, have several limitations when used to evaluate individual accessibility. Two alternatives for overcoming some of the difficulties involved are explored in this study. One is to adapt these measures for evaluating individual accessibility using a disaggregate, nonzonal approach. The other is to develop different types of measures based on an alternative conceptual framework. To pursue the former alternative, this study specifies and examines eighteen gravity-type and cumulative-opportunity accessibility measures using a point-based spatial framework. For the latter option, twelve space-time accessibility measures are developed based on the construct of a prism-constrained feasible opportunity set. This paper compares the relationships and spatial patterns of these thirty measures using network-based GIS procedures. Travel diary data collected in Columbus, Ohio, and a digital data set of 10,727 selected land parcels are used for all computation. Results of this study indicate that space-time and integral indices are distinctive types of accessibility measures which reflect different dimensions of the accessibility experience of individuals. Since space-time measures are more capable of capturing interpersonal differences, especially the effect of space-time constraints, they are more “gender sensitive” and helpful for unraveling gender/ethnic differences in accessibility. An important methodological implication is that whether accessibility is observed to be important or different between individuals depends heavily on whether the measure used is capable of revealing the kind of differences the analyst intends to observe.read more
Citations
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Space-time accessibility measures: A geocomputational algorithm with a focus on the feasible opportunity set and possible activity duration
Hyun Mi Kim,Mei Po Kwan +1 more
TL;DR: A new operational method and GIS-based algorithm is developed that better represents the space-time characteristics of urban opportunities and human activity-travel behavior and helps overcome several shortcomings of previous approaches to evaluating space- time accessibility.
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A three-step floating catchment area method for analyzing spatial access to health services
Neng Wan,Bin Zou,Troy Sternberg +2 more
TL;DR: A case study of spatial access to primary care physicians along the Austin–San Antonio corridor area in central Texas showed that the proposed three-step floating catchment area method effectively minimizes the overestimation of healthcare demand and reflects a more balanced geographic pattern of spatialAccess than E2SFCA.
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Individual Accessibility Revisited: Implications for Geographical Analysis in the Twenty-first Century
Mei Po Kwan,Joe Weber +1 more
TL;DR: In this paper, the authors argue that the analysis of individual accessibility can no longer ignore the complexities and opportunities brought forth by these changes and propose new possibilities for modeling individual accessibility and their implications for geographical analysis in the twenty-first century.
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How mobility habits influenced the spread of the COVID-19 pandemic: Results from the Italian case study.
TL;DR: Estimation results showed that mobility habits represent one of the variables that explains the number of COVID-19 infections jointly with the numberof tests/day and some environmental variables and may not always contribute to effectively slowing down the spread of virus worldwide.
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A suite of methods for representing activity space in a healthcare accessibility study
TL;DR: This work describes the construction and application of the standard deviational ellipse (SDE) at one and two standard deviations, and three additional network-based measures of activity space using common tools in GIS: the road network buffer (RNB), the 30-minute standard travel time polygon (STT), and the relative travel timepolygon (RTT).
References
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How Accessibility Shapes Land Use
TL;DR: In this article, an empirical analysis of the residential development patterns illustrates that accessibility and the availability of vacant developable land can be used as the basis of a residential land use model.
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TL;DR: In this article, the authors provide a framework for the development of accessibility measures and two case studies suggestive of the range of possible approaches are presented, as well as issues that planners must address in developing an accessibility measure.
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Defining and Estimating a Trading Area
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