Spatial data in epidemiology can be collected from various sources:
1. Surveillance Systems: Health departments often use surveillance systems to collect data on disease cases, which include geographical information. 2. Surveys and Field Studies: Epidemiologists may conduct surveys or field studies to gather spatial data directly from affected populations. 3. Remote Sensing: Satellite imagery and remote sensing technologies provide environmental data that can be linked with epidemiological data for analysis. 4. Mobile Technologies: Smartphones and GPS devices facilitate real-time data collection and geolocation of disease cases.