Demographics Data Methods, Limitations, and References
Total Population
Methods
- Data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder.
- Data were mapped using ArcGIS for Desktop and ArcGIS Online.
Limitations
- Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S.
- Data were estimates based on survey responses, and not actual counts.
- Estimates have some chance of error.
References
Age
Methods
- Spatial data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder. Data were mapped using ArcGIS for Desktop and ArcGIS Online.
- Population growth data were obtained from the California Department of Finance’s 2018 State and County Population Projections by Race/Ethnicity. The California Department of Finance analyzes current population counts, births, deaths, and migration patterns to estimate population growth.
Limitations
- Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S. Data were estimates based on survey responses, and not actual counts. Estimates have some chance of error.
- Population growth is a prediction and therefore may contain some errors.
References
- U.S. Census Bureau, American Community Survey and Puerto Rico Community Survey 2016 Subject Definitions
- California Department of Finance, Modeling Methodology for the State and County Population Projects
Race/Ethnicity
Methods
- Spatial data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder. Data were mapped using ArcGIS for Desktop and ArcGIS Online.
- Population growth data were obtained from the California Department of Finance’s 2018 State and County Population Projections by Race/Ethnicity. The California Department of Finance analyzes current population counts, births, deaths, and migration patterns to estimate population growth.
Limitations
- Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S. Data were estimates based on survey responses, and not actual counts. Estimates have some chance of error.
- Population growth is a prediction and therefore may contain some errors.
References
- U.S. Census Bureau, American Community Survey and Puerto Rico Community Survey 2016 Subject Definitions
- California Department of Finance, Modeling Methodology for the State and County Population Projects
Limited English Speaking Households
Methods
- Data were obtained from U.S. Census Bureau’s 2012-2016 American Community Survey 5-year Estimates at American FactFinder.
- Data were mapped using ArcGIS for Desktop and ArcGIS Online.
Limitations
- Approximately 295,000 households are selected to participate in the annual American Community Survey, or less than 1 percent of all households in the U.S.
- Data were estimates based on survey responses, and not actual counts.
- Estimates have some chance of error.
References