Description: The CSA project was developed to provide a common geographic boundary for reporting departmental statistics for unincorporated areas to the Board of Supervisors. The CIO and the LA County Enterprise GIS group worked with the Los Angeles County Board of Supervisors Unincorporated Area and Field Deputies to establish names that reflect as best as possible the general name preferences of residents and historical names of areas. A Board Motion will establish these area names as “Board Approved.” CSAs differ from the more informal “Community” geographies because:They are primarily focused on broad statistics and reporting, not mapping of communities.They represent board approved geographies comprised of Census block groups split by cities.They must cover the entire unincorporated CountyThere can be no holes or overlapping areasThe CSAs were created using Census Block Groups split by cities (e.g. "Split Block Groups") as a geographic building block. This allows users to leverage the rich information provided by the US Census Bureau to better report statistics, including rates from the decennial census and population estimates. Population estimates are included in the POPULATION field. These values represent the most recently available population estimate information for the year 2016.In the City of Los Angeles, the LA City Neighborhood file was overlaid on the Block Groups and boundaries assigned using the centroid of the block group - therefore, while the names of the CSAs in LA City match the neighborhood file, the boundaries are not the same.Additionally, CSAs are to be named according to the following recommended naming conventions:All names will be assumed to begin with “Unincorporated” (e.g. Unincorporated El Camino Village). They will not be part of the Statistical Geography Name (so the name of the Statistical Area would be “El Camino Village”).Names will not contain “Island” – beginning each name with “Unincorporated” will distinguish an area from any surrounding cities. There may be one or more exceptions for certain small areas (e.g. “Bandini Islands”)A forward slash implies an undetermined boundary between two areas within a statistical geography (e.g. Westfield/Academy Hills or View Park/Windsor Hills)Certain established names may include hyphens (e.g. Florence-Firestone)Aliases may be defined in parentheses (e.g. Unincorporated Long Beach (Bonner/Carson Park))
Copyright Text: Los Angeles County Board of Supervisors, LA County Enterprise GIS
Description: The Provisional Service Planning Area (SPA)Layer contains Department of Public Health SPAs as of 2011. Furthermore, Health Districts comprise the building blocks of Los Angeles County SPAs. The Provisional SPAs were created by the Los Angeles County Department of Public Health for planning purposes and are subject to change.
Description: This layer contains the 2011 Official Supervisorial District Boundary for the County of Los Angeles, drawn at the parcel level, per Assessor parcels and the County Cadastral Landbase.Supplemental Information: Adopted September 27, 2011 – Another entry on this portal includes redistricting information from the Districts’ adoption in 2011, along with boundaries drawn at the TIGER street map level. Per Sec. 21500 of the California Elections Code, Supervisor District boundaries are adjusted following each decennial federal census. Published in the County Code under Title 1, Chapter 1.08, boundary descriptions are based on census tracts and city boundaries at the time of adoption.Metes and Bounds descriptions were prepared by the Department of Public Works.2010 Census Blocks provide more information and GIS data downloads on this portal. Census tracts listed in the County Code correspond to the first six digits of the GIS attribute CTCB10.City Boundaries and City Annexations provide current and historical legal city boundary information on this portal.
Copyright Text: Marianne Jeffers / Thierno Diallo
County of Los Angeles
Department of Public Works Survey/Mapping and Property Management Division
Description: This layer represents current city boundaries within Los Angeles County. The Los Angeles County Department of Public Works provides the most current shapefiles representing city boundariesand city annexationson the Los Angeles County GIS Data Portal. True, legal boundaries are only determined on the ground by surveyors licensed in the State of California. Numerous records are freely available at the Land Records Informaitonwebsite, hosted by the Department of Public Works.Principal attributes include:CITY_NAME: represents the city's name.CITY_TYPE: may be used for definition queries; "Unincorporated" or "City".FEAT_TYPE: identifies the feature that each polygon represents:Land - This value is used for polygons representing the land masses, if you want to see only land features on your map.Pier - This value is used for polygons representing piers along the coastline. One example is the Santa Monica Pier.Breakwater - This value is used for polygons representing man-made barriers that protect the harbors.Water - This value is used for polygons representing navigable waters inside the harbors and marinas.3NM Buffer - This value is used for polygons representing the three seaward nautical miles within the cities' limits, per the Submerged Lands Act.POPULATION: Information in this field is supplied by Mark Greninger (mgreninger@cio.lacounty.gov).Reference Date: 2013
Copyright Text: This data is maintained by the Los Angeles County Department of Public Works. Contacts: Thierno Diallo, 626-458-6920, tdiallo@dpw.lacounty.gov , Michael Maung, 626-458-7078, mmaung@dpw.lacounty.gov
Description: The Urban Displacement Project is a research and action initiative of UC Berkeley in collaboration with researchers at UCLA and Portland State University with input and funding from community based organizations, regional planning agencies, foundations, and the State of California’s Air Resources Board (ARB). The project aims to understand the nature of gentrification and displacement in American cities, with a current focus on the San Francisco Bay Area, Southern California and Portland. The goal of the project is to create tools to help communities identify the pressures surrounding them and take more effective action. The UCLA team developed a neighborhood database for the Los Angeles County region to include a series of data on demographic, socio-economic and housing characteristics in both transit and non-transit neighborhoods by Census Tract over time. Additionally, it also examined neighborhood upscaling which can occur in both disadvantaged and advantaged neighborhoods in terms of income, human capital, and housing cost.
Copyright Text: Zuk, M., & Chapple, K. (2015). Urban Displacement Project.
Description: The Urban Displacement Project is a research and action initiative of UC Berkeley in collaboration with researchers at UCLA and Portland State University with input and funding from community based organizations, regional planning agencies, foundations, and the State of California’s Air Resources Board (ARB). The project aims to understand the nature of gentrification and displacement in American cities, with a current focus on the San Francisco Bay Area, Southern California and Portland. The goal of the project is to create tools to help communities identify the pressures surrounding them and take more effective action. The UCLA team developed a neighborhood database for the Los Angeles County region to include a series of data on demographic, socio-economic and housing characteristics in both transit and non-transit neighborhoods by Census Tract over time. Additionally, it also examined neighborhood upscaling which can occur in both disadvantaged and advantaged neighborhoods in terms of income, human capital, and housing cost.
Copyright Text: Zuk, M., & Chapple, K. (2015). Urban Displacement Project.
Description: The Urban Displacement Project is a research and action initiative of UC Berkeley in collaboration with researchers at UCLA and Portland State University with input and funding from community based organizations, regional planning agencies, foundations, and the State of California’s Air Resources Board (ARB). The project aims to understand the nature of gentrification and displacement in American cities, with a current focus on the San Francisco Bay Area, Southern California and Portland. The goal of the project is to create tools to help communities identify the pressures surrounding them and take more effective action. The UCLA team developed a neighborhood database for the Los Angeles County region to include a series of data on demographic, socio-economic and housing characteristics in both transit and non-transit neighborhoods by Census Tract over time. Additionally, it also examined neighborhood upscaling which can occur in both disadvantaged and advantaged neighborhoods in terms of income, human capital, and housing cost.
Copyright Text: Zuk, M., & Chapple, K. (2015). Urban Displacement Project.
