Related Experiment Video
Updated: Oct 14, 2025

Trajectory Data Analyses for Pedestrian Space-time Activity Study
Published on: February 25, 2013
Using GIS-based spatial analysis to determine urban greenspace accessibility for different racial groups in the
Arun Pallathadka1, Laxmi Pallathadka2, Sneha Rao3
1Department of Geography, Portland State University, Portland, OR 97201 USA.
Abstract:
As the United States leads COVID-19 cases on global charts, its spatial distribution pattern offers a unique opportunity for studying the social and ecological factors that contribute to the pandemic's scale and size. We use a GIS-data-based approach to evaluate four American cities-Anchorage (Alaska), Atlanta (Georgia), Phoenix (Arizona), and Portland (Oregon) characterized by the significant composition of different racial and ethnic group populations. Building upon previous studies that investigated urban spatial inequalities using the environmental justice framework, we examine: (1) the relative racial vulnerability of Census Block Groups (CBG) and ZIP Code Tabulation Areas (ZCTA) to COVID-19 (2) green space distribution at CBG and ZCTA scale. Using standard normalization methods, we ranked racial vulnerability against % available green space for each city. Our results highlight the legacy of past and present urban planning injustices. The project is useful from environmental justice, public health management, and urban planning perspectives.
Supplementary Information:
The online version contains supplementary material available at 10.1007/s10708-021-10538-8.
More Related Videos
Related Concept Videos
Manipulation and Analysis
Levels of Use of a GIS
Selected Data About Geographic Locations
Applications of GIS: Disaster Management and Emergency Response
GIS Software, Hardware, and Sources of GIS Data
Introduction to GIS

