Measuring Rapid Urban Changes with LISA and LOSH Statistics

Authors: Yuzhou Chen*, , Ran Tao, university of south florida
Topics: Urban Geography
Keywords: shrinking cities, spatial statistic, spatial heterogeneity
Session Type: Virtual Paper
Day: 4/8/2021
Start / End Time: 8:00 AM / 9:15 AM
Room: Virtual 33
Presentation File: No File Uploaded

Urban change is a commonplace yet still heavily-discussed topic, which consists of both shrinkage and growth. Many developed countries have already experienced the shrinking city phenomena, known examples include Detroit and Youngstown in the U.S., Liverpool and Manchester in the U.K. In developing countries such as China, even the general trend is still rapid urban growth, urban shrinkage has gradually occurred. Some regions are growing and shrinking at the same time, which increases the difficulty of measuring rapid urban changes that are spatially heterogeneous. In this paper, we propose a new method framework to solve this issue by combining two spatial statistics, namely LISA (Anselin 1995) and LOSH (Ord and Getis 2012). By jointly analyzing the G_i^* statistic (Getis and Ord 1992; Ord and Getis 1995) and H_i statistic (Ord and Getis 2012) for several consecutive years using population activity data, we are able to categorize each basic spatial unit, e.g., grid cell or census tract, into the corresponding stage of urban development. The results can not only indicate the status and trend of urban development at a very fine scale but also reflect the rate of change.

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