Synthetic populations are geospatially explicit representations of households and persons. RTI’s nationwide synthetic populations are derived from American Community Survey (ACS) demographic estimates and ACS Public Use Microdata Samples (PUMS). These synthetic populations match household spatial distributions at 100M grid cell resolution and household demographic distributions at the census block group resolution. Synthetic populations are…

Combining GPS units with accelerometers is becoming a common method of objectively assessing adult physical activity locations. However, few best practices have been proposed for designing these studies. Using accelerometer and GPS data collected from over 200 adults in five cities, 10+ minute bouts of physical activity were given location codes with a Google Maps-based…