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Represent's the outer land boundary of Los Angeles County. Land boundaries are derived from the Los Angeles County Cadastral landbase. Ocean boundaries are drived from NOAA coastline data, modified to conform with LAR-IAC aerial imagery where needed. The most current copy of this data is available at the Los Angeles County GIS Data Portal.
The CDP boundary usually is defined by the Census Bureau in cooperation with state, local or tribal officials. The boundaries are updated prior to each decennial census. These boundaries, which usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity boundary, have no legal status, nor do these places have officials elected to serve traditional municipal functions. CDP boundaries may change from one decennial census to the next with changes in the settlement pattern; a CDP with the same name as in an earlier census does not necessarily have the same boundary. CDPs must be contained within a single state and may not extend into an incorporated place. There are no population size requirements for CDPs. incorporated
CDP data is download from Census Bureau's TIGER 2020 website (https://www2.census.gov/geo/tiger/TIGER2020/PLACE/) and extracted for Los Angeles County. This data includes LA County 88 incorporated cities and 54 CDPs.
Data Fields:
GEOOID: ID field (combination of State code and place code)
STATE: State code (06 for California)
PLACE: City and CDP code
NAME: Place name (City and CDP name)
LSAD: Type - City or CDP
AREA: Area in US Acre.
The boundaries usually are defined in cooperation with local or tribal officials and generally updated prior to each decennial census. These boundaries, which usually coincide with visible features or the boundary of an adjacent incorporated place or another legal entity boundary, have no legal status, nor do these places have officials elected to serve traditional municipal functions. CDP boundaries may change from one decennial census to the next with changes in the settlement pattern; a CDP with the same name as in an earlier census does not necessarily have the same boundary. CDPs must be contained within a single state and may not extend into an incorporated place. There are no population size requirements for CDPs.
http://www.census.gov/geo/reference/gtc/gtc_place.html
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 boundaries and city annexations on 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 Information website, 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: 2021