Lu, YongmeiFang, Tianfang Bernie2021-04-142021-04-142014-12Lu, Y., & Fang, T. B. (2014). Examining personal air pollution exposure, intake, and health danger zone using time geography and 3D geovisualization. International Journal of Geo-Information, 4(1), pp. 32-46.2220-9964https://hdl.handle.net/10877/13380Expanding traditional time geography, this study examines personal exposure to air pollution and personal pollutant intake, and defines personal health danger zones by accounting for individual level space-time behavior. A 3D personal air pollution and health risk map is constructed to visualize individual space-time path, personal Air Quality Indexes (AQIs), and personal health danger zones. Personal air pollution exposure level and its variation through space and time is measured by a portable air pollutant sensor coupled with a portable GPS unit. Personal pollutant intake is estimated by accounting for air pollutant concentration in immediate surroundings, individual’s biophysical characteristics, and individual’s space-time activities. Personal air pollution danger zones are defined by comparing personal pollutant intake with air quality standard; these zones are particular space-time-activity segments along an individual’s space-time path. Being able to identify personal air pollution danger zones can help plan for proper actions aiming at controlling health impacts from air pollution. As a case study, this paper reports on an examination and visualization of an individual’s two-day ozone exposure, intake and danger zones in Houston, TexasText15 pages1 file (.pdf)enair pollution exposureair pollutant intakespace-time pathtime geographypersonal health danger zoneGeography and Environmental StudiesArticle© 2014 The Authors.https://doi.org/10.3390/ijgi4010032This work is licensed under a Creative Commons Attribution 4.0 International License.