Spatial Equity with Census Population Data vs. Floating Population Data: The Distribution of Earthquake Evacuation Shelters in Daegu, South Korea

Abstract

The spatial equity of outdoor evacuation sites designated for emergency evacuation must be secured. In particular, public administrators must ensure spatial equity in preparing for unpredictable evacuation demands, such as earthquakes. This study analyzed the spatial equity of earthquake evacuation shelters in Daegu, South Korea, by using population data at the local level by time- and date-based mobile phone location data (i.e., floating population data). We compared our analysis of the spatial equity and error rate in this case with census data. Ultimately, our results demonstrate that the use of census population data can cause significant error in evaluations of the equity of evacuation shelter accessibility when the floating population data acquired through mobile phone location data are assumed exact.

Impact of COVID-19 Pandemic on Home Range in a Suburban City in the Osaka Metropolitan Area

“…In order to understand daily activities more accurately, mobile phone GPS data is used. Lee et al [17] clarified that equitable policy decisions could be made based on the LH data because the LH data thus obtained can provide more accurate population data than census data in emergencies. Oliver et al [18] pointed out the effectiveness of using mobile phone data for analysis in the COVID-19 pandemic.…”

Towards Resilient Cities: Optimizing Shelter Site Selection and Disaster Prevention Life Circle Construction Using GIS and Supply-Demand Considerations

“…When incorporating demographic data into spatial analysis or interdisciplinary research, geoscientific investigations often encounter the challenge of the "variable metaquestion", hindering convenient visualization and spatial analysis [26,27]. Therefore, this paper opts for the 2020 population raster data with 100 m accuracy from the official World-Pop website as the primary basis for analysis.…”