Purpose |
Estimating personal exposures from ambient air pollution measures through (generated) personal exposure profiles among multiple participants |
Exploring personal exposure profiles aggregated by ordered sequences of activity-travel episodes |
Monitoring how levels of air pollution have changed over time across space |
Access levels |
Complete access to database, and control over dashboard configuration |
Full access to their collected individual data, but limited control over the dashboard platform |
Limited access to the de-identified information about air pollution exposure, which is aggregated to averages per hours of the day across all study participants |
Travel routes |
GPS tracks and travel trajectories as lines |
Travel trajectories as lines |
Grid aggregations
(squares) created through Geohash tools |
Pollution measurements |
Individual exposure profile by pollutant concentrations measured |
Pollutant concentrations measured with the number hours of air quality standard (or guidelines) are exceeded |
Pollutant concentrations measured and contrasted with air quality data from static monitoring sites nearby (i.e., UK Automatic Urban and Rural Network as air quality monitors) |
Spatial resolution |
Geographic location at a certain precision |
Personal daily trajectories at the street segment level |
Grid cells constructed by implemented Geomasking technique (e.g., geohash grid aggregation) |
Temporal resolution |
Every minute for each of seven days |
Averaged to hour of the day for each of seven days |
Averaged to each hour of the day across the seven days (no disaggregation by day of the week) |