Bring Your Own Location Data: Use of Google Smartphone Location History Data for Environmental Health Research.

Background: Environmental exposures are commonly estimated using spatial methods, with most epidemiological studies relying on home addresses. Passively collected smartphone location data, like Google Location History (GLH) data, may present an opportunity to integrate existing long-term time-activity data.

Objectives: We aimed to evaluate the potential use of GLH data for capturing long-term retrospective time-activity data for environmental health research.