The LA Times – “This map contains four different types of data:

• Fire origins mark the fire fighter’s best guess of where the fire started. The data is provided by CalFire and the Geospatial Multi-Agency Coordination.
• Fire perimeters are the latest known extent of where the fire has burned. This data is provided by GeoMAC.
• Hotspots are areas suspected to be on fire according to satellite imagery analysis. The data is provided by Descartes Labs and the National Oceanic and Atmospheric Administration. Descartes Labs data is sourced from NOAA’s Geostationary Operational Environmental Satellite satellites. Additional data is provided by NOAA’s Hazard Mapping System Fire and Smoke Product, which is human reviewed and sourced from NASA’s Moderate Resolution Imaging Spectroradiometer and Visible Infrared Imaging Radiometer Suite satellites.
• Air pollution data is provided by AirNow.
• This map was created and is maintained by Casey Miller..”