For the outline of California as well as the county and major cities, we used the California open use database (https://data.ca.gov/dataset/ca-geographic-boundaries). The state boundary is black while the county boundaries are white. The counties I did them in were light gray almost with a light opacity. Major cities are highlighted in green. Major rivers and creeks (blue lines) are based on the National Hydrography Data (https://data.cnra.ca.gov/dataset/national-hydrography-dataset-nhd). Terrain is based on the National Elevation data set (https://www.sciencebase.gov/catalog/item/542aebf9e4b057766eed286a). Elevation is shown as a green gradient ranging from -82 meters (dark green) atDeath Valley to 4,320 meters (almost white) at Mount Whitney.