Description: 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.
Copyright Text: County of Los Angeles, Department of Public Works, Mapping and GIS Services
Contact: Thierno Diallo, PE, 626-458-6920, tdiallo@dpw.lacounty.gov
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
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Min. Scale: 0.0 Max. Scale: 0.0 Label Placement: esriServerPolygonPlacementAlwaysHorizontal Label Expression: [COMMUNITY] Use Coded Values: true Symbol:
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Min. Scale: 300000.0 Max. Scale: 0.0 Label Placement: esriServerPolygonPlacementAlwaysHorizontal Label Expression: [COMMUNITY] Use Coded Values: true Symbol:
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Description: Blocks are typically bounded by streets, roads or creeks. In cities, a census block may correspond to a city block, but in rural areas where there are fewer roads, blocks may be limited by other features.ImportantThe Census Bureau mistakenly merged Census Tract 1370.00 into Tract 8002.04 in the 2010 census, and released block level data tables with that mistake. This mistake was corrected in 2011, however the data tables (SF1, etc) were not updated to reflect this change. For this file, the CT10 field and the CTCB10 fields reflect the original 2010 data, and include that mistake.In 2012, the Census Bureau further complicated matters by merging Tract 9304.01 into Tract 1370.00. The CT12 field reflects this update, which is also reflected in the CENSUS_TRACTS_2010 and the CENSUS_BLOCK_GROUPS_2010 datasets.
Copyright Text: Los Angeles County, US Census Bureau
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[132, 0, 168, 255] Background Color: N/A Outline Color: N/A Vertical Alignment: baseline Horizontal Alignment: left Right to Left: false Angle: 0 XOffset: 0 YOffset: 0 Size: 8 Font Family: Arial Font Style: normal Font Weight: normal Font Decoration: none
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
