Tabular data of population by age groups, by ethnic groups and by gender, and the poverty by ethnic groups is attached to the split tract geography to create this split tract with population and poverty data. Split tract data is the product of 2010 census tracts split by 2017 incorporated city boundaries and unincorporated community/countywide statistical areas (CSA) boundaries. The census tract boundaries have been altered and aligned where necessary with legal city boundaries and unincorporated areas, including shoreline/coastal areas.

Census Tract:

Every 10 years the Census Bureau counts the population of the United States as mandated by Constitution. The Census Bureau (https://www.census.gov/)released 2010 geographic boundaries data including census tracts for the analysis and mapping of demographic information across the United States.

City Boundary:

City Boundary data is the base map information for the County of Los Angeles. These City Boundaries are based on the Los Angeles County Seamless Cadastral Landbase. The Landbase is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works (DPW). This layer represents current city boundaries within Los Angeles County. The DPW provides the most current shapefiles representing city boundaries and city annexations. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California.

Countywide Statistical Areas (CSA):

The countywide Statistical Area (CSA) was defined to provide a common geographic boundary for reporting departmental statistics for unincorporated areas and incorporated Los Angeles city to the Board of Supervisors. The CSA boundary and CSA names are established by the CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies that reflect as best as possible the general name preferences of residents and historical names of areas. This data is primarily focused on broad statistics and reporting, not mapping of communities. This data is not designed to perfectly represent communities, nor jurisdictional boundaries such as Angeles National Forest. CSA represent board approved geographies comprised of Census block groups split by cities.

Data Field:

CT10: 2010 Census tract

FIP17: 2017 City FIP Code

CITY: City name for incorporated cities and “Unincorporated” for unincorporated areas (as of July 1, 2017)

CSA: Countywide Statistical Area (CSA) - Unincorporated area community names and LA City neighborhood names.

CT10FIP17CSA: 2010 census tract with 2017 city FIPs for incorporated cities, unincorporated areas and LA neighborhoods.

SPA12: 2012 Service Planning Area (SPA) number.

SPA_NAME: Service Planning Area name.

HD12: 2012 Health District (HD) number:

HD_NAME: Health District name.

POP17_AGE_0_4: 2017 population 0 to 4 years old

POP17_AGE_5_9: 2017 population 5 to 9 years old

POP17_AGE_10_14: 2017 population 10 to 14 years old

POP17_AGE_15_17: 2017 population 15 to 17 years old

POP17_AGE_18_19: 2017 population 18 to 19 years old

POP17_AGE_20_44: 2017 population 20 to 24 years old

POP17_AGE_25_29: 2017 population 25 to 29 years old

POP17_AGE_30_34: 2017 population 30 to 34 years old

POP17_AGE_35_44: 2017 population 35 to 44 years old

POP17_AGE_45_54: 2017 population 45 to 54 years old

POP17_AGE_55_64: 2017 population 55 to 64 years old

POP17_AGE_65_74: 2017 population 65 to 74 years old

POP17_AGE_75_84: 2017 population 75 to 84 years old

POP17_AGE_85_100: 2017 population 85 years and older

POP17_WHITE: 2017 Non-Hispanic White

POP17_BLACK: 2017 Non-Hispanic African American

POP17_AIAN: 2017 Non-Hispanic American Indian or Alaska Native

POP17_ASIAN: 2017 Non-Hispanic Asian

POP17_HNPI: 2017 Non-Hispanic Hawaiian Native or Pacific Islander

POP17_HISPANIC: 2017 Hispanic

POP17_MALE: 2017 Male

POP17_FEMALE: 2017 Female

POV17_WHITE: 2017 Non-Hispanic White below 100% Federal Poverty Level

POV17_BLACK: 2017 Non-Hispanic African American below 100% Federal Poverty Level

POV17_AIAN: 2017 Non-Hispanic American Indian or Alaska Native below 100% Federal Poverty Level

POV17_ASIAN: 2017 Non-Hispanic Asian below 100% Federal Poverty Level

POV17_HNPI: 2017 Non-Hispanic Hawaiian Native or Pacific Islander below 100% Federal Poverty Level

POV17_HISPANIC: 2017 Hispanic below 100% Federal Poverty Level

POV17_TOTAL: 2017 Total population below 100% Federal Poverty Level

POP17_TOTAL: 2017 Total Population

AREA_SQMIL: Area in square mile

POP17_DENSITY: Population per square mile.

POV17_PERCENT: Poverty percentage.

How this data created?

The tabular data of population by age groups, by ethnic groups and by gender, and the poverty by ethnic groups is attributed to the split tract geography to create this data. Split tract polygon data is created by intersecting 2010 census tract polygons, LA Country City Boundary polygons and Countywide Statistical Areas (CSA) polygon data. The resulting polygon boundary aligned and matched with the legal city boundary whenever possible.

Note:

1. Population and poverty data estimated as of July 1, 2017.

2. 2010 Census tract and 2020 census tracts are not the same. Similarly, city and community boundary are not the same because boundary is reviewed and updated annually.