Credit: Yu Yu, Michael Jerrett, Kimberly C. Paul, Jason Su, I-Fan Shih, Jun Wu, Eunice Lee, Kosuke Inoue, Mary Haan, and Beate Ritz, (2021)
Estimated annual average ozone (O3) concentration surface in the Sacramento area in 2016 with a spatial resolution of 1 × 1 km, Sacramento Area Latino Study on Aging (SALSA, 1998–2007). Ambient O3 exposure levels were modeled with a land-use regression built with saturation monitoring data collected at 49 sites across the Sacramento metropolitan area. The base map was developed by National Geographic and ESRI and reflects the distinctive National Geographic cartographic style in a multiscale reference map of the world. The map was authored using data from a variety of leading data providers, including Garmin, HERE Technologies, the United Nations Environment Programme’s World Conservation Monitoring Centre, the National Aeronautics and Space Administration, the European Space Agency, and the U.S. Geological Survey, and others. County boundary data was taken from the California Open Data Portal (https://data.ca.gov/dataset/ca-geographic-boundaries)