100+ datasets found
  1. a

    Data from: County Boundary

    • hub.arcgis.com
    • geohub.lacity.org
    • +6more
    Updated Nov 14, 2015
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    lahub_admin (2015). County Boundary [Dataset]. https://hub.arcgis.com/maps/lahub::county-boundary
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    Dataset updated
    Nov 14, 2015
    Dataset authored and provided by
    lahub_admin
    Area covered
    Description

    This layer contains Legal City boundaries within Los Angeles County. The Los Angeles County Department of Public Works provides the most current shape file of these city boundaries for download at its Spatial Information Library.Note: This boundary layer will not line up with the Thomas Brothers city layer. Principal attributes include:CITY_NAME: represents the city's name.CITY_TYPE: may be used for definition queries; "Unincorporated" or "City".FEAT_TYPE: contains the type of feature each polygon represents:Land - Use this value for your definition query if you want to see only land features on your map.Pier - One example is the Santa Monica Pier. Man-made features may be regarded as extensions of the coastline.Breakwater - Examples include the breakwater barriers that protect the Los Angeles Harbor.Water - Polygons with this attribute value represent internal navigable waters. Examples of internal waters are found in the Long Beach Harbor and in Marina del Rey.3NM Buffer - Per the Submerged Lands Act, the seaward boundaries of coastal cities and unincorporated county areas are three nautical miles (a nautical mile is 1852 meters) from the coastline.

  2. a

    Los Angeles County Substructure Maps

    • egis-lacounty.hub.arcgis.com
    • geohub.lacity.org
    • +4more
    Updated Jul 10, 2019
    + more versions
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    County of Los Angeles (2019). Los Angeles County Substructure Maps [Dataset]. https://egis-lacounty.hub.arcgis.com/maps/59ef5776954447b2bce593191220a98a
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    Dataset updated
    Jul 10, 2019
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    This website provides a limited number of Substructure Maps in “pdf” format via GIS polygons representing grids containing URL links. Across various areas of Los Angeles County, paper maps were created by Public Works (PW) and its predecessor Departments to show underground utilities such as cable TV, gas, oil, and telephone lines.

    Though most of these maps are no longer updated, they can be useful as a research resource. Every reasonable effort has been made to assure the accuracy of this data and the maps referenced. Some cities may provide substructure information for the areas not covered by these grids. Additional and more accurate substructure data and information may also be obtained through the utility companies. Before digging, it is strongly advised to contact the Underground Service Alert (DigAlert Express) at www.digalert.org/digexpress.html or by calling 811.

    Please note that California State Law Says, You Must Contact DigAlert!

    The County of Los Angeles makes no warranty, representation, or guarantee as to the content, sequence, accuracy, timeliness, or completeness of any of the data provided herein or of any maps referenced. Los Angeles County Public Works recommends that all utility research be conducted under the supervision of a licensed civil engineer.

  3. K

    Los Angeles City Boundary

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Oct 3, 2018
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    City of Los Angeles, California (2018). Los Angeles City Boundary [Dataset]. https://koordinates.com/layer/98158-los-angeles-city-boundary/
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    shapefile, geopackage / sqlite, mapinfo tab, geodatabase, dwg, csv, pdf, mapinfo mif, kmlAvailable download formats
    Dataset updated
    Oct 3, 2018
    Dataset authored and provided by
    City of Los Angeles, California
    Area covered
    Description

    Polygon vector map data covering boundaries for the City of Los Angeles containing 4 features.

    Boundary GIS (Geographic Information System) data is spatial information that delineates the geographic boundaries of specific geographic features. This data typically includes polygons representing the outlines of these features, along with attributes such as names, codes, and other relevant information.

    Boundary GIS data is used for a variety of purposes across multiple industries, including urban planning, environmental management, public health, transportation, and business analysis.

    Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

  4. l

    City Boundaries Lines

    • data.lacounty.gov
    • geohub.lacity.org
    • +1more
    Updated Oct 9, 2020
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    County of Los Angeles (2020). City Boundaries Lines [Dataset]. https://data.lacounty.gov/datasets/city-boundaries-lines/explore
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    Dataset updated
    Oct 9, 2020
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    This line feature layer contains Legal City boundaries within Los Angeles County.

    The principal attribute is BDRY_TYPE which represents the boundary feature types. Use its values below for definition queries and layer symbology for your mapping needs.

    Coast - This value represents the coastline. This data is carefully maintained by DPW staff, based Los Angeles Region Imagery Acquisition Consortium data.

    Land City - This value represents city boundaries on land.

    Land County - This value represents the county boundary on land.

    Pier - One example is the Santa Monica Pier. Man-made features may be regarded as extensions of the coastline.

    Breakwater - Examples include the breakwater barriers that protect the Los Angeles Harbor.

    Water - This value is used to separate features representing internal navigable waters and the ocean. Examples of internal waters are found in the Long Beach Harbor and in Marina del Rey.

    Ocean - This value is used to represent ocean boundaries between cities in addition to the seaward boundaries of coastal cities. Per the Submerged Lands Act, the seaward boundaries of coastal cities and unincorporated county areas are three nautical miles (a nautical mile is 1852 meters) from the coastline.

  5. l

    Data from: County Boundary

    • geohub.lacity.org
    • data.lacounty.gov
    • +3more
    Updated Dec 22, 2023
    + more versions
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    County of Los Angeles (2023). County Boundary [Dataset]. https://geohub.lacity.org/datasets/lacounty::county-boundary
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    Dataset updated
    Dec 22, 2023
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    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.

  6. l

    City and Unincorporated Boundaries (Legal)

    • data.lacounty.gov
    • geohub.lacity.org
    • +5more
    Updated Sep 16, 2016
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    County of Los Angeles (2016). City and Unincorporated Boundaries (Legal) [Dataset]. https://data.lacounty.gov/datasets/lacounty::city-and-unincorporated-boundaries-legal
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    Dataset updated
    Sep 16, 2016
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    This layer contains Legal City boundaries within Los Angeles County. The Landbase is jointly maintained by the Los Angeles County Assessor and the Los Angeles County Department of Public Works.The Los Angeles County Department of Public Works provides the most current shape file of these city boundaries for download at its https://egis-lacounty.hub.arcgis.com/datasets/la-county-city-boundaries/explore?location=34.153321%2C-118.083123%2C9.49.Note: This boundary layer will not line up with the Thomas Brothers® city layer.Principal attributes include:CITY_NAME: represents the city's name.CITY_TYPE: may be used for definition queries; "Unincorporated" or "City".FEAT_TYPE: contains the type of feature each polygon represents:Land - Use this value for your definition query if you want to see only land features on your map.Pier - One example is the Santa Monica Pier. Man-made features may be regarded as extensions of the coastline.Breakwater - Examples include the breakwater barriers that protect the Los Angeles Harbor.Water - Polygons with this attribute value represent internal navigable waters. Examples of internal waters are found in the Long Beach Harbor and in Marina del Rey.3NM Buffer - Per the Submerged Lands Act, the seaward boundaries of coastal cities and unincorporated county areas are three nautical miles (a nautical mile is 1852 meters) from the coastlineURL: cities website current as of 01/01/2023This product is for information purposes and should not be used for legal, engineering, or survey purposes. County assumes no liability for any errors or omissions.

  7. K

    Los Angeles Parcels

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Oct 3, 2018
    + more versions
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    City of Los Angeles, California (2018). Los Angeles Parcels [Dataset]. https://koordinates.com/layer/98155-los-angeles-parcels/
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    dwg, mapinfo mif, pdf, shapefile, csv, geodatabase, kml, geopackage / sqlite, mapinfo tabAvailable download formats
    Dataset updated
    Oct 3, 2018
    Dataset authored and provided by
    City of Los Angeles, California
    Area covered
    Description

    This layer represents current city parcels within the City of Los Angeles. It shares topology with the Landbase parcel lines feature class. The Mapping and Land Records Division of the Bureau of Engineering, Department of Public Works provides the most current geographic information of the public right of way, ownership and land record information. The legal boundaries are determined on the ground by license surveyors in the State of California, and by recorded documents from the Los Angeles County Recorder's office and the City Clerk's office of the City of Los Angeles. Parcel and ownership information are available on NavigateLA, a website hosted by the Bureau of Engineering, Department of Public Works.Associated information about the landbase parcels is entered into attributes. Principal attributes include:PIN and PIND: represents the unique auto-generated parcel identifier and key to related features and tables. This field is related to the LA_LEGAL, LA_APN and LA_HSE_NBR tables. PIN contains spaces and PIND replaces those spaces with a dash (-).LA_LEGAL - Table attributes containing legal description. Principal attributes include the following:TRACT: The subdivision tract number as recorded by the County of Los AngelesMAP_REF: Identifies the subdivision map book reference as recorded by the County of Los Angeles.LOT: The subdivision lot number as recorded by the County of Los Angeles.ENG_DIST: The four engineering Districts (W=Westla, C=Central, V= Valley and H=Harbor).CNCL_DIST: Council Districts 1-15 of the City of Los Angeles. OUTLA means parcel is outside the City.LA_APN- Table attributes containing County of Los Angeles Assessors information. Principal attributes include the following:BPP: The Book, Page and Parcel from the Los Angeles County Assessors office. SITUS*: Address for the property.LA_HSE_NBR - Table attributes containing housenumber information. Principal attributes include the following:HSE_ID: Unique id of each housenumber record.HSE_NBR: housenumber numerical valueSTR_*: Official housenumber addressFor a complete list of attribute values, please refer to Landbase_parcel_polygons_data_dictionary.

    © Randy Price Division Manager Mapping and Land Records Division Bureau of Engineering / Department of Public Works City of Los Angeles This layer is sourced from lacitydbs.org

  8. a

    LA County Streets

    • egis-lacounty.hub.arcgis.com
    • geohub.lacity.org
    • +2more
    Updated May 14, 2014
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    County of Los Angeles (2014). LA County Streets [Dataset]. https://egis-lacounty.hub.arcgis.com/maps/la-county-streets/about
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    Dataset updated
    May 14, 2014
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    Designed, created and shared by the Los Angeles County Enterprise GIS (eGIS) team, the Los Angeles County Streetmap Basemap has been designed to show the transportation network and jurisdictions across the entire county. Data included in this basemap but not limited to include freeways, highways, major and minor roads, railways, Metro lines, Metro stations, city boundaries, hillshade, national hydrographic data and land types. Designed to be suitable for large scale mapping, the basemap includes building footprints, address point and LMS data. This basemap is cached up to scale 1: 564.

  9. C

    Los Angeles County MPA Maps

    • data.cnra.ca.gov
    pdf, tiff
    Updated Apr 24, 2019
    + more versions
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    Ocean Education (2019). Los Angeles County MPA Maps [Dataset]. https://data.cnra.ca.gov/dataset/los-angeles-county-mpa-maps
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    tiff(4043846), tiff(2923520), pdf(3382722), pdf(2155946), tiff(2933952), tiff(11129436), tiff(4551182), tiff(15378592), tiff(6012616)Available download formats
    Dataset updated
    Apr 24, 2019
    Dataset authored and provided by
    Ocean Education
    Area covered
    Los Angeles County
    Description

    A collection of maps of Los Angeles County MPAs to target various audiences for improving understanding of the location, purpose and management of California’s marine protected areas.

  10. TIGER/Line Shapefile, 2022, County, Los Angeles County, CA, All Lines

    • catalog.data.gov
    • s.cnmilf.com
    Updated Jan 27, 2024
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    U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Spatial Data Collection and Products Branch (Point of Contact) (2024). TIGER/Line Shapefile, 2022, County, Los Angeles County, CA, All Lines [Dataset]. https://catalog.data.gov/dataset/tiger-line-shapefile-2022-county-los-angeles-county-ca-all-lines
    Explore at:
    Dataset updated
    Jan 27, 2024
    Dataset provided by
    United States Census Bureauhttp://census.gov/
    Area covered
    California, Los Angeles County
    Description

    The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Edge refers to the linear topological primitives that make up MTDB. The All Lines Shapefile contains linear features such as roads, railroads, and hydrography. Additional attribute data associated with the linear features found in the All Lines Shapefile are available in relationship (.dbf) files that users must download separately. The All Lines Shapefile contains the geometry and attributes of each topological primitive edge. Each edge has a unique TIGER/Line identifier (TLID) value.

  11. l

    LA Times Neighborhood Boundaries

    • geohub.lacity.org
    • visionzero.geohub.lacity.org
    • +4more
    Updated Oct 7, 2016
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    DataLA (2016). LA Times Neighborhood Boundaries [Dataset]. https://geohub.lacity.org/datasets/la-times-neighborhood-boundaries
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    Dataset updated
    Oct 7, 2016
    Dataset authored and provided by
    DataLA
    License

    Attribution 4.0 (CC BY 4.0)https://creativecommons.org/licenses/by/4.0/
    License information was derived automatically

    Area covered
    Description

    Description: The neighborhoods shown in this dataset are derived from a larger dataset drawn and maintained by the Data Desk, a team of Times reporters and Web developers in downtown L.A. The boundaries have expanded and shifted over time and now cover all of Los Angeles County broken down into 272 neighborhoods.This version of the LA Times boundaries only includes neighborhoods fully or partially within the City of Los Angeles. Neighborhoods that extend into other cities have been clipped to only show the portion(s) of the neighborhoods that are within the City of Los Angeles.Data Source: Los Angeles Times' Mapping LA project.Last Updated: October 7, 2016Refresh Rate: Never - Historical data (Note: should the LA Times update their Mapping LA project with new boundaries in the future, a new LA-specific layer will be added to the GeoHub as well.)

  12. l

    LA County Administrative Boundaries

    • visionzero.geohub.lacity.org
    Updated Nov 17, 2015
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    lahub_admin (2015). LA County Administrative Boundaries [Dataset]. https://visionzero.geohub.lacity.org/maps/11df56b01320454483fe6af594d408d2
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    Dataset updated
    Nov 17, 2015
    Dataset authored and provided by
    lahub_admin
    License

    Public Domain Mark 1.0https://creativecommons.org/publicdomain/mark/1.0/
    License information was derived automatically

    Area covered
    Description

    Contains layers with administrative boundaries in Los Angeles County

  13. a

    LA County ZIP Codes

    • egis-lacounty.hub.arcgis.com
    • hub.arcgis.com
    Updated Feb 5, 2016
    + more versions
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    County of Los Angeles (2016). LA County ZIP Codes [Dataset]. https://egis-lacounty.hub.arcgis.com/datasets/la-county-zip-codes
    Explore at:
    Dataset updated
    Feb 5, 2016
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    US Postal Service ZIP Code boundaries. This layer was created by Los Angeles County eGIS to align with parcel boundaries.ZIP is an acronym for Zone Improvement Plan.Legal vs. Postal Cities: Many users confuse the name the Post Office delivers mail to (e.g. Van Nuys, Hollywood) as a legal city (in this case Los Angeles), when they are a postal city. The County contains 88 legal cities, and over 400 postal names that are tied to the ZIP Codes. To support usability and geocoding, we have attached the first 3 postal cities to each address, based upon its ZIP Code.The US Postal Service is the authoritative source for ZIP Code data. See their website for more information.

  14. l

    City Boundaries

    • data.lacounty.gov
    Updated Nov 9, 2021
    + more versions
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    County of Los Angeles (2021). City Boundaries [Dataset]. https://data.lacounty.gov/datasets/city-boundaries-4
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    Dataset updated
    Nov 9, 2021
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    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 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

  15. l

    LA County Base

    • geohub.lacity.org
    • data.lacounty.gov
    • +3more
    Updated Apr 29, 2014
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    County of Los Angeles (2014). LA County Base [Dataset]. https://geohub.lacity.org/maps/ccf869e80eb044ed84b84e9bf377f496
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    Dataset updated
    Apr 29, 2014
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    Designed, created and shared by the Los Angeles County Enterprise GIS (eGIS) team, the Los Angeles County Base is designed to be overlaid with data layers. The basemap features roads, city and communities boundaries, national hydrographic data, shaded relief imagery, along with land cover and land type classifications. As you zoom further into Los Angeles County the aerial imagery layer is displayed at around the scale of 1:18,056. The basemap covers the extent of Los Angeles County, and has been designed to show different levels of detail based on zoom levels. This basemap is cached up to scale 1: 564.

  16. TIGER/Line Shapefile, 2023, County, Los Angeles County, CA, All Lines

    • catalog.data.gov
    • datasets.ai
    Updated Aug 11, 2025
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    U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geospatial Products Branch (Point of Contact) (2025). TIGER/Line Shapefile, 2023, County, Los Angeles County, CA, All Lines [Dataset]. https://catalog.data.gov/dataset/tiger-line-shapefile-2023-county-los-angeles-county-ca-all-lines
    Explore at:
    Dataset updated
    Aug 11, 2025
    Dataset provided by
    United States Census Bureauhttp://census.gov/
    Area covered
    California, Los Angeles County
    Description

    The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master Address File / Topologically Integrated Geographic Encoding and Referencing (MAF/TIGER) Database (MTDB). The MTDB represents a seamless national file with no overlaps or gaps between parts, however, each TIGER/Line shapefile is designed to stand alone as an independent data set, or they can be combined to cover the entire nation. Edge refers to the linear topological primitives that make up MTDB. The All Lines Shapefile contains linear features such as roads, railroads, and hydrography. Additional attribute data associated with the linear features found in the All Lines Shapefile are available in relationship (.dbf) files that users must download separately. The All Lines Shapefile contains the geometry and attributes of each topological primitive edge. Each edge has a unique TIGER/Line identifier (TLID) value.

  17. K

    Los Angeles County, CA Parcels

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Sep 25, 2018
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    Los Angeles County, California (2018). Los Angeles County, CA Parcels [Dataset]. https://koordinates.com/layer/97864-los-angeles-county-ca-parcels/
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    geodatabase, geopackage / sqlite, mapinfo tab, kml, pdf, mapinfo mif, dwg, shapefile, csvAvailable download formats
    Dataset updated
    Sep 25, 2018
    Dataset authored and provided by
    Los Angeles County, California
    Area covered
    Description

    Vector polygon map data of property parcels from Los Angeles County, California containing 2,405,987 features.

    Property parcel GIS map data consists of detailed information about individual land parcels, including their boundaries, ownership details, and geographic coordinates.

    Property parcel data can be used to analyze and visualize land-related information for purposes such as real estate assessment, urban planning, or environmental management.

    Available for viewing and sharing as a map in a Koordinates map viewer. This data is also available for export to DWG for CAD, PDF, KML, CSV, and GIS data formats, including Shapefile, MapInfo, and Geodatabase.

  18. l

    LA County Canvas

    • geohub.lacity.org
    • data.lacounty.gov
    • +2more
    Updated Apr 29, 2014
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    County of Los Angeles (2014). LA County Canvas [Dataset]. https://geohub.lacity.org/maps/lacounty::la-county-canvas/about
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    Dataset updated
    Apr 29, 2014
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Description

    Designed, created and shared by the Los Angeles County Enterprise GIS (eGIS) team, the Los Angeles County Canvas Basemap is designed using minimal colors, labels and features. City boundaries, roads networks, land types and national hydrographic data are a few of the layers used to create this basemap. Unlike the Los Angeles County Base Basemap, the Canvas does not contain aerial imagery. This basemap covers the extent of Los Angeles County and may be used for large scale mapping. This basemap is cached up to scale 1: 564.

  19. d

    Public Transit Lines Los Angeles, CA , 2016, Los Angeles County GIS

    • catalog.data.gov
    Updated Feb 25, 2025
    + more versions
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    County of Los Angeles (Publisher) (2025). Public Transit Lines Los Angeles, CA , 2016, Los Angeles County GIS [Dataset]. https://catalog.data.gov/dataset/public-transit-lines-los-angeles-ca-2016-los-angeles-county-gis13
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    Dataset updated
    Feb 25, 2025
    Dataset provided by
    County of Los Angeles (Publisher)
    Area covered
    California, Los Angeles County, Los Angeles
    Description

    This dataset contains the information for the transit lines in Los Angeles, California. The file contains left and right alignments for five Metro lines to include: the Red and Purple Line, the Gold Line, the Green Line, the Expo Line, the Blue Line. The alignments were created from coordinate points extracted from the Record Drawing. The Record Drawings included spiral curve, circle curve, and alignment data. The Record Drawings were created at various time from 11/1985 to 04/1999. Only tangent lines and circular curve data were used to create the alignments. Spiral data and crossover data were estimated and do not reflect the actual curvature of the tracks.

  20. l

    LA County City Boundaries Web App

    • data.lacounty.gov
    Updated Jul 7, 2020
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    County of Los Angeles (2020). LA County City Boundaries Web App [Dataset]. https://data.lacounty.gov/datasets/la-county-city-boundaries-web-app/about
    Explore at:
    Dataset updated
    Jul 7, 2020
    Dataset authored and provided by
    County of Los Angeles
    Area covered
    Los Angeles County
    Description

    The City Boundaries are derived from the Los Angeles County Cadastral Landbase, maintained by the Los Angeles Assessor Office and Department of Public Works. Official AreasFor the official areas of the unincorporated and cities in the County of Los Angeles, click here.Download data: City Boundaries Los Angeles County Boundary Countywide Statistical Areas (CSA)

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lahub_admin (2015). County Boundary [Dataset]. https://hub.arcgis.com/maps/lahub::county-boundary

Data from: County Boundary

Related Article
Explore at:
Dataset updated
Nov 14, 2015
Dataset authored and provided by
lahub_admin
Area covered
Description

This layer contains Legal City boundaries within Los Angeles County. The Los Angeles County Department of Public Works provides the most current shape file of these city boundaries for download at its Spatial Information Library.Note: This boundary layer will not line up with the Thomas Brothers city layer. Principal attributes include:CITY_NAME: represents the city's name.CITY_TYPE: may be used for definition queries; "Unincorporated" or "City".FEAT_TYPE: contains the type of feature each polygon represents:Land - Use this value for your definition query if you want to see only land features on your map.Pier - One example is the Santa Monica Pier. Man-made features may be regarded as extensions of the coastline.Breakwater - Examples include the breakwater barriers that protect the Los Angeles Harbor.Water - Polygons with this attribute value represent internal navigable waters. Examples of internal waters are found in the Long Beach Harbor and in Marina del Rey.3NM Buffer - Per the Submerged Lands Act, the seaward boundaries of coastal cities and unincorporated county areas are three nautical miles (a nautical mile is 1852 meters) from the coastline.

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