The District boundary definitions are primarily based on the California county boundaries. The Board of Equalization (BOE) County and City Boundary web service is the authoritative source of County boundaries and this was used to digitize the district boundaries based on the data from March 2023. This data is solely for informational purposes. District 9 has been operating independent of the Central Region since November 1, 2015. Kern County remains the only split county in the state, between Districts 6 and 9 respectively. The BOE data was also used to create the district boundary layers along the coastline.

This map delineates CalTRANS district boundaries. It was created for the Governor's Office of the Tribal Advisor by the California Technology Agency/GIS Unit.

The layers contained here are California State Agencies and Local Transportation Organizations. Each boundary contains the name, address and web site for each office.

California Metropolitan Planning Organization (MPO) legislative boundaries, primarily for regional planning applications. MPO is a federally mandated and federally funded transportation policy-making organization in the United States that is made up of representatives from local government and governmental transportation authorities. https://gisdata-caltrans.opendata.arcgis.com/datasets/55975bdc89a9456382dbd1fbda98c45a_0

California Regional Transportation Planning Agencies (RTPA) legislative boundaries, primarily for regional planning applications. The State Water Board and the Regional Water Boards have been entrusted with broad duties and powers to preserve and enhance all beneficial uses of the state's immensely complex waterscape. https://gisdata-caltrans.opendata.arcgis.com/datasets/ccbb62df26b84974a87ab3c02b2b4e8d_0

Caltrans Districts The District boundary definitions are primarily based on the county boundaries. There are 12 Caltrans Districts in California. https://gisdata-caltrans.opendata.arcgis.com/datasets/a0f1da19bffe471ea89bd6a241e5604b_0

The California Department of Water Resources (DWR) is part of the California Natural Resources Agency and is responsible for the management and regulation of the State of California's water usage.

California's 35 local Air Districts are responsible for regional air quality planning, monitoring, and stationary source and facility permitting. The districts administer air quality improvement grant programs and are CARB's primary partners in efforts to ensure that all Californians breathe clean air.

The California State Water Resources Control Board (SWRCB) is one of six branches of the California Environmental Protection Agency. California's pioneering clean water act is the 1969 Porter-Cologne Water Quality Control Act (Porter-Cologne Act).[5] Through the Porter-Cologne Act, the State Water Board and the Regional Water Boards have been entrusted with broad duties and powers to preserve and enhance all beneficial uses of the state's immensely complex waterscape. The Porter-Cologne Act is recognized as one of the nation's strongest pieces of anti-pollution legislation, and was so influential that Congressional authors used sections of the Act as the basis for the Federal Clean Water Act.

Many California State GIS layers can be downloaded at this URL https://gis.data.ca.gov/

The D12 Park and Ride Map App provides park and ride lots information and other transportation facilities information within Caltrans District 12. Caltrans will continue to explore opportunities to increase the number of Park and Ride facilities through coordination with OCTA, local jurisdictions, and private property owners to identify additional suitable sites.

This polygon shapefile represents California Department of Transportation (Caltrans) districts in California as of 2015. Caltrans has 12 districts and 2 regions as high-level management areas. As of Nov. 1, 2015, District 9 has become an independent district separate from the Central region. These boundaries are primarily based on the county boundaries. Census TIGER/Line county data from 2010 were used to create this layer. This layer is part of a collection of GIS data created by the California Department of Transportation (Caltrans).

Bottleneck Mapping is a subproject of the Mobility Performance Report, which is one of the products of the Mobility Performance Reporting and Analysis Program (MPRAP). The Mobility Performance Report is prepared by the California Department of Transportation (Caltrans) and District staff to provide detailed data about highway system performance related to congestion and mobility. Caltrans collects vehicle counts and calculates speeds at all hours of the day and all days of the week in major metropolitan areas throughout California via the Caltrans Performance Measurement System (PeMS--see Data Source tab). This information helps identify congestion bottlenecks and results in more cost-effective investments to improve the performance of the State Highway System.

WARNING: This is a pre-release dataset and its fields names and data structures are subject to change. It should be considered pre-release until the end of March 2025. The schema changed in February 2025 - please see below. We will post a roadmap of upcoming changes, but service URLs and schema are now stable. For deployment status of new services in February 2025, see https://gis.data.ca.gov/pages/city-and-county-boundary-data-status. Additional roadmap and status links at the bottom of this metadata.

Purpose

County boundaries along with third party identifiers used to join in external data. Boundaries are from the California Department of Tax and Fee Administration (CDTFA). These boundaries are the best available statewide data source in that CDTFA receives changes in incorporation and boundary lines from the Board of Equalization, who receives them from local jurisdictions for tax purposes. Boundary accuracy is not guaranteed, and though CDTFA works to align boundaries based on historical records and local changes, errors will exist. If you require a legal assessment of boundary location, contact a licensed surveyor.

This dataset joins in multiple attributes and identifiers from the US Census Bureau and Board on Geographic Names to facilitate adding additional third party data sources. In addition, we attach attributes of our own to ease and reduce common processing needs and questions. Finally, coastal buffers are separated into separate polygons, leaving the land-based portions of jurisdictions and coastal buffers in adjacent polygons. This layer removes the coastal buffer polygons. This feature layer is for public use.

Related Layers

This dataset is part of a grouping of many datasets:

1. Cities: Only the city boundaries and attributes, without any unincorporated areas
   • With Coastal Buffers
   • Without Coastal Buffers
2. Counties: Full county boundaries and attributes, including all cities within as a single polygon
   • With Coastal Buffers
   • Without Coastal Buffers (this dataset)
3. Cities and Full Counties: A merge of the other two layers, so polygons overlap within city boundaries. Some customers require this behavior, so we provide it as a separate service.
   • With Coastal Buffers
   • Without Coastal Buffers
4. City and County Abbreviations
5. Unincorporated Areas (Coming Soon)
6. Census Designated Places
7. Cartographic Coastline
   • Polygon
   • Line source (Coming Soon)

Point of Contact

California Department of Technology, Office of Digital Services, odsdataservices@state.ca.gov

Field and Abbreviation Definitions

• CDTFA_COUNTY: CDTFA county name. For counties, this will be the name of the polygon itself. For cities, it is the name of the county the city polygon is within.
• CDTFA_COPRI: county number followed by the 3-digit city primary number used in the Board of Equalization"s 6-digit tax rate area numbering system. The boundary data originate with CDTFA's teams managing tax rate information, so this field is preserved and flows into this dataset.
• CENSUS_GEOID: numeric geographic identifiers from the US Census Bureau
• CENSUS_PLACE_TYPE: City, County, or Town, stripped off the census name for identification purpose.
• GNIS_PLACE_NAME: Board on Geographic Names authorized nomenclature for area names published in the Geographic Name Information System
• GNIS_ID: The numeric identifier from the Board on Geographic Names that can be used to join these boundaries to other datasets utilizing this identifier.
• CDT_COUNTY_ABBR: Abbreviations of county names - originally derived from CalTrans Division of Local Assistance and now managed by CDT. Abbreviations are 3 characters.
• CDT_NAME_SHORT: The name of the jurisdiction (city or county) with the word "City" or "County" stripped off the end. Some changes may come to how we process this value to make it more consistent.
• AREA_SQMI: The area of the administrative unit (city or county) in square miles, calculated in EPSG 3310 California Teale Albers.
• OFFSHORE: Indicates if the polygon is a coastal buffer. Null for land polygons. Additional values include "ocean" and "bay".
• PRIMARY_DOMAIN: Currently empty/null for all records. Placeholder field for official URL of the city or county
• CENSUS_POPULATION: Currently null for all records. In the future, it will include the most recent US Census population estimate for the jurisdiction.
• GlobalID: While all of the layers we provide in this dataset include a GlobalID field with unique values, we do not recommend you make any use of it. The GlobalID field exists to support offline sync, but is not persistent, so data keyed to it will be orphaned at our next update. Use one of the other persistent identifiers, such as GNIS_ID or GEOID instead.

Caltrans emergency road closures data represents highway postmile segment lengths closed related to wildfire impacts and safety concerns. These road closures are identified and reported by departmental field staff, Traffic Management Centers (TMCs), and compiled by Caltrans Headquarters Communication Center in coordination and support of law enforcement and fire officials. Caltrans statewide Highway Condition Reporting Requirements (HCRR) enable the timely notification and collection of road restriction information that includes: Caltrans district, California county, type of road restriction, geographic location, postmiles, detour if applicable, and temporal information on closure and estimated opening times.This data is updated on schedule twice daily at 0900 and 1600 through the duration of California statewide wildfire support and coordination efforts.Additional information on Caltrans postmile system and road closures can be found by visiting the Caltrans Postmile Service application and the Caltrans Quickmap web application. For current highway conditions please visit Caltrans Road Information.For GIS related inquiries of this data, please contact Caltrans HQ Division of Maintenance GIS

The layers contained here are California State Agencies and Local Transportation Organizations. Each boundary contains the name, address and web site for each office.

California Metropolitan Planning Organization (MPO) legislative boundaries, primarily for regional planning applications. MPO is a federally mandated and federally funded transportation policy-making organization in the United States that is made up of representatives from local government and governmental transportation authorities. https://gisdata-caltrans.opendata.arcgis.com/datasets/55975bdc89a9456382dbd1fbda98c45a_0

California Regional Transportation Planning Agencies (RTPA) legislative boundaries, primarily for regional planning applications. The State Water Board and the Regional Water Boards have been entrusted with broad duties and powers to preserve and enhance all beneficial uses of the state's immensely complex waterscape. https://gisdata-caltrans.opendata.arcgis.com/datasets/ccbb62df26b84974a87ab3c02b2b4e8d_0

Caltrans Districts The District boundary definitions are primarily based on the county boundaries. There are 12 Caltrans Districts in California. https://gisdata-caltrans.opendata.arcgis.com/datasets/a0f1da19bffe471ea89bd6a241e5604b_0

The California Department of Water Resources (DWR) is part of the California Natural Resources Agency and is responsible for the management and regulation of the State of California's water usage.

California's 35 local Air Districts are responsible for regional air quality planning, monitoring, and stationary source and facility permitting. The districts administer air quality improvement grant programs and are CARB's primary partners in efforts to ensure that all Californians breathe clean air.

The California State Water Resources Control Board (SWRCB) is one of six branches of the California Environmental Protection Agency. California's pioneering clean water act is the 1969 Porter-Cologne Water Quality Control Act (Porter-Cologne Act).[5] Through the Porter-Cologne Act, the State Water Board and the Regional Water Boards have been entrusted with broad duties and powers to preserve and enhance all beneficial uses of the state's immensely complex waterscape. The Porter-Cologne Act is recognized as one of the nation's strongest pieces of anti-pollution legislation, and was so influential that Congressional authors used sections of the Act as the basis for the Federal Clean Water Act.

Many California State GIS layers can be downloaded at this URL https://gis.data.ca.gov/

The list of California Transportation Planning Agencies is current as of February, 2014, provided by Division of Transportation Planning, Office of Regional and Interagency Planning. With the exception of Tahoe Regional Planning Agency (TRPA*), all of the RTPA boundaries follow county boundaries, some RTPA are multi-county.

The California Department of Transportation (Caltrans) and the California Energy Commission (CEC) are partnering to implement the federal National Electric Vehicle Infrastructure (NEVI) Program, which allocates $5 billion to the states to create a nationwide, interconnected network of DC fast chargers along the National Highway Systems. California's share will be $384 million over 5 years. This map was developed to help prospective applicants and interested parties identify eligible areas for infrastructure deployment.InstructionsViewers can display Alternative Fuel Corridors, NEVI 2 (GFO-24-606) corridor groups and corridor segments, NEVI 1 (GFO-23-601) corridor groups, electric vehicle (EV) charging stations, Tribal lands, California-designated low-income or disadvantaged communities, metropolitan planning organizations, regional transportation planning agencies, California state legislative districts, counties, Caltrans districts, utility districts, and congressional districts in this interactive map. The map initially displays the corridor groups and corridor segments eligible for California's Round 2 NEVI solicitation. Viewers can toggle individual layers on and off using the map layers menu located to the right of the map. Some layers are organized into groups; viewers can toggle all layers within a group or select specific ones. The legend to the left of the map will show the layers that have been turned on. There is a search tool to the right of the map that enables viewers to type in an address and locate the address on the map. A basemap selector allows viewers to view road detail. Additional information on the map can be found under the information icon. Viewers can download the map files by clicking on the Data and Supplemental Links icon. Map layers include:An Alternative Fuel Corridors layer that shows designated corridors for California's NEVI funding program. Users can click on a corridor segment to view the start and end of each corridor. When selected, a pop-up window will appear that shows the corridor name and description.A NEVI 2 (GFO-24-606) corridor groups layer shows corridor groups eligible for Round 2 of California's NEVI funding program. Note that this layer is only visible when the Alternative Fuels Corridors layer is turned off.NEVI 2 (GFO-24-606) corridor group labels for enhanced accessibility. Note that labels are only visible at certain ranges (zoom in and out to view labels) and when the Alternative Fuels Corridors layer is turned off. NEVI 2 (GFO-24-606) corridor segment labels for enhanced accessibility. Note that labels are only visible at certain ranges (zoom in and out to view labels) and when the Alternative Fuels Corridors layer is turned off. A NEVI 1 (GFO-23-601) corridor groups layer that shows corridor groups eligible for Round 1 of California's NEVI funding program. Note that this layer is only visible when the Alternative Fuels Corridors layer is turned off.A layer showing the locations of EV charging stations awarded through Round 1 of California's NEVI funding program that are planned for deployment. A layer showing California-designated disadvantaged or low-income communities. A layer showing California Federally Recognized Tribal Lands. A layer showing Metropolitan Planning Organizations. A layer showing Regional Transportation Planning Agencies. A layer showing California State Senate Districts. A layer showing California State Assembly Districts. A layer showing California Counties. EV charging stations layers (existing DC fast charging stations that are located within one mile of a NEVI-eligible corridor offramp). One layer shows locations of EV charging stations with DC fast charging capabilities that meet the NEVI power level and four-port minimum requirement and could likely become part of the NEVI network if these stations became compliant with other NEVI program requirements such as data reporting. The other layer shows DC fast charging stations that do not meet NEVI power-level or port count requirements but could be upgraded to be NEVI-compliant. Users can click on EV charging stations and a pop-up window will appear with more information on the station (i.e., station address, total port count, minimum NEVI standard, etc.). These data were last updated in March 2024. Please refer to the Department of Energy's Alternative Fuels Data Center and PlugShare for up-to-date existing and planned DC fast charger site information. A layer showing Caltrans Districts. A layer showing Electric Utilities (IOUs and POUs). A layer showing California Congressional Districts. BackgroundThe $5 billion NEVI Program is part of the $1.2 trillion Infrastructure Investment and Jobs Act (IIJA) signed into law by President Biden in November 2021. IIJA commits significant federal funding to clean transportation and energy programs throughout the U.S. to reduce climate changing greenhouse gas emissions. Caltrans is the designated lead agency for NEVI. The CEC is their designated state energy partner. Caltrans and the CEC have partnered to create California's Deployment Plan for the National Electric Vehicle Infrastructure Program that describes how the state plans to allocate its $384 million share of federal NEVI funds to build out a network of modern, high-powered DC fast chargers along federally designated Alternative Fuel Corridors throughout California. California's latest NEVI Deployment Plan was submitted to the Joint Office of Energy and Transportation on August 1, 2023 and approved on September 29, 2023. The Plans must be updated each year over 5 years.NEVI funds must be used initially on federally-designated Alternative Fuel Corridors (shown on the map).Each NEVI-funded DC fast charge station will have a minimum of four 150 kW Combined Charging System (CCS) connectors. Stations will be located no more than 50 miles apart along freeways and highways and no more than 1 mile from a freeway exit or highway roadway. States are required to emphasize equity, with at least 40 percent of NEVI benefits going to disadvantaged, low income, rural and Tribal communities.Data SourcesData are from the Federal Highway Administration's Alternative Fuel Corridors website, the U.S. Department of Energy's Alternative Fuels Data Center Station Data for Alternative Fuel Corridors (as of September 2022), Argonne National Laboratory's Electric Vehicle Charging Justice40 Map, and the California Air Resources Board's Map of California Climate Investments Priority Populations 2022 CES 4.0. ContactPlease submit questions and comments to mediaoffice@energy.ca.gov

Throughout California, this detailed map show what government agencies have adopted Cal-ITP products services to show to California leadership. Cal-ITP products include; GTFS-rt, contactless-payments, Benefits, Remix, GTFS Data QualityAll records show the agencies headquarters as a icon, and the products they have adopted from Cal-ITP. There are three overlays that can used. The first allows you to see the boundaries of the agencies transit services. The second shows the boundaries of all Caltrans districts. The third shows the California’s Senate and Assembly districts.

InstructionsViewers can display corridor groups, corridor segments, electric vehicle (EV) charging stations, Justice40 disadvantaged communities, Tribal lands, California-designated low-income or disadvantaged communities, metropolitan planning organizations, regional transportation planning agencies, California state legislative districts, counties, Caltrans districts, utility districts, and congressional districts in this interactive map. The map initially displays corridor groups and their corridor segments included in the Round 2 NEVI solicitation. Viewers can toggle individual layers on and off using the map layers menu located to the right of the map. Some layers are organized into groups; viewers can toggle all layers within a group or select specific ones. The legend to the left of the map will show the layers that have been turned on. There is a search tool to the right of the map that enables viewers to type in an address and locate the address on the map. A basemap selector allows viewers to view road detail. Additional information on the map can be found under the information icon. Viewers can download the map files by clicking on the Data and Supplemental Links icon. Map layers include:A Corridor groups layer that shows designated corridor groups for California's NEVI funding program. Users can click on a corridor segment to view the start and end of each segment within a corridor group. When selected, a pop-up window will appear that identifies the corridor group number, corridor segment, corridor name, minimum number of charging stations required, minimum number of ports required, and needed locations, if applicable, for the corridor segment. Corridor group labels for enhanced accessibility. Note that labels are only visible at certain ranges (zoom in and out to view labels).

This application is being updated for digital accessibility and will continue to function while updates are in progress. The California governmental boundaries on this map include Senate Districts, Assembly Districts, and Congressional Districts. The Caltrans’ district boundaries, California’s city and county boundaries are displayed as well. Assembly District boundaries and Senate District boundaries GIS data were downloaded from California Citizens Redistricting Commission http://wedrawthelines.ca.gov . The Senate Districts layer represents California 2011 Senate District boundaries. The data is the equivalency of the final certified district map of the California State Senate District boundaries that was adopted on August 15, 2011 by the California Citizens Redistricting Commission (CRC) for the June 2012 primary elections. The Assembly Districts layer represents California 2011 Assembly boundaries. The official membership is current as of September 3, 2015 (Updated by Caltrans, HQ GIS Branch.)

The Congressional Districts layer represents the political boundaries for the 113th congressional districts. The official membership is current as of January 3, 2015 (Updated by Caltrans, HQ GIS Branch.) The original GIS data was downloaded from TIGER/Line database.

WARNING: This is a pre-release dataset and its fields names and data structures are subject to change. It should be considered pre-release until the end of 2024. Expected changes:Metadata is missing or incomplete for some layers at this time and will be continuously improved.We expect to update this layer roughly in line with CDTFA at some point, but will increase the update cadence over time as we are able to automate the final pieces of the process.This dataset is continuously updated as the source data from CDTFA is updated, as often as many times a month. If you require unchanging point-in-time data, export a copy for your own use rather than using the service directly in your applications.PurposeCounty and incorporated place (city) boundaries along with third party identifiers used to join in external data. Boundaries are from the authoritative source the California Department of Tax and Fee Administration (CDTFA), altered to show the counties as one polygon. This layer displays the city polygons on top of the County polygons so the area isn"t interrupted. The GEOID attribute information is added from the US Census. GEOID is based on merged State and County FIPS codes for the Counties. Abbreviations for Counties and Cities were added from Caltrans Division of Local Assistance (DLA) data. Place Type was populated with information extracted from the Census. Names and IDs from the US Board on Geographic Names (BGN), the authoritative source of place names as published in the Geographic Name Information System (GNIS), are attached as well. Finally, the coastline is used to separate coastal buffers from the land-based portions of jurisdictions. This feature layer is for public use.Related LayersThis dataset is part of a grouping of many datasets:Cities: Only the city boundaries and attributes, without any unincorporated areasWith Coastal BuffersWithout Coastal BuffersCounties: Full county boundaries and attributes, including all cities within as a single polygonWith Coastal BuffersWithout Coastal BuffersCities and Full Counties: A merge of the other two layers, so polygons overlap within city boundaries. Some customers require this behavior, so we provide it as a separate service.With Coastal Buffers (this dataset)Without Coastal BuffersPlace AbbreviationsUnincorporated Areas (Coming Soon)Census Designated Places (Coming Soon)Cartographic CoastlinePolygonLine source (Coming Soon)Working with Coastal BuffersThe dataset you are currently viewing includes the coastal buffers for cities and counties that have them in the authoritative source data from CDTFA. In the versions where they are included, they remain as a second polygon on cities or counties that have them, with all the same identifiers, and a value in the COASTAL field indicating if it"s an ocean or a bay buffer. If you wish to have a single polygon per jurisdiction that includes the coastal buffers, you can run a Dissolve on the version that has the coastal buffers on all the fields except COASTAL, Area_SqMi, Shape_Area, and Shape_Length to get a version with the correct identifiers.Point of ContactCalifornia Department of Technology, Office of Digital Services, odsdataservices@state.ca.govField and Abbreviation DefinitionsCOPRI: county number followed by the 3-digit city primary number used in the Board of Equalization"s 6-digit tax rate area numbering systemPlace Name: CDTFA incorporated (city) or county nameCounty: CDTFA county name. For counties, this will be the name of the polygon itself. For cities, it is the name of the county the city polygon is within.Legal Place Name: Board on Geographic Names authorized nomenclature for area names published in the Geographic Name Information SystemGNIS_ID: The numeric identifier from the Board on Geographic Names that can be used to join these boundaries to other datasets utilizing this identifier.GEOID: numeric geographic identifiers from the US Census Bureau Place Type: Board on Geographic Names authorized nomenclature for boundary type published in the Geographic Name Information SystemPlace Abbr: CalTrans Division of Local Assistance abbreviations of incorporated area namesCNTY Abbr: CalTrans Division of Local Assistance abbreviations of county namesArea_SqMi: The area of the administrative unit (city or county) in square miles, calculated in EPSG 3310 California Teale Albers.COASTAL: Indicates if the polygon is a coastal buffer. Null for land polygons. Additional values include "ocean" and "bay".GlobalID: While all of the layers we provide in this dataset include a GlobalID field with unique values, we do not recommend you make any use of it. The GlobalID field exists to support offline sync, but is not persistent, so data keyed to it will be orphaned at our next update. Use one of the other persistent identifiers, such as GNIS_ID or GEOID instead.AccuracyCDTFA"s source data notes the following about accuracy:City boundary changes and county boundary line adjustments filed with the Board of Equalization per Government Code 54900. This GIS layer contains the boundaries of the unincorporated county and incorporated cities within the state of California. The initial dataset was created in March of 2015 and was based on the State Board of Equalization tax rate area boundaries. As of April 1, 2024, the maintenance of this dataset is provided by the California Department of Tax and Fee Administration for the purpose of determining sales and use tax rates. The boundaries are continuously being revised to align with aerial imagery when areas of conflict are discovered between the original boundary provided by the California State Board of Equalization and the boundary made publicly available by local, state, and federal government. Some differences may occur between actual recorded boundaries and the boundaries used for sales and use tax purposes. The boundaries in this map are representations of taxing jurisdictions for the purpose of determining sales and use tax rates and should not be used to determine precise city or county boundary line locations. COUNTY = county name; CITY = city name or unincorporated territory; COPRI = county number followed by the 3-digit city primary number used in the California State Board of Equalization"s 6-digit tax rate area numbering system (for the purpose of this map, unincorporated areas are assigned 000 to indicate that the area is not within a city).Boundary ProcessingThese data make a structural change from the source data. While the full boundaries provided by CDTFA include coastal buffers of varying sizes, many users need boundaries to end at the shoreline of the ocean or a bay. As a result, after examining existing city and county boundary layers, these datasets provide a coastline cut generally along the ocean facing coastline. For county boundaries in northern California, the cut runs near the Golden Gate Bridge, while for cities, we cut along the bay shoreline and into the edge of the Delta at the boundaries of Solano, Contra Costa, and Sacramento counties.In the services linked above, the versions that include the coastal buffers contain them as a second (or third) polygon for the city or county, with the value in the COASTAL field set to whether it"s a bay or ocean polygon. These can be processed back into a single polygon by dissolving on all the fields you wish to keep, since the attributes, other than the COASTAL field and geometry attributes (like areas) remain the same between the polygons for this purpose.SliversIn cases where a city or county"s boundary ends near a coastline, our coastline data may cross back and forth many times while roughly paralleling the jurisdiction"s boundary, resulting in many polygon slivers. We post-process the data to remove these slivers using a city/county boundary priority algorithm. That is, when the data run parallel to each other, we discard the coastline cut and keep the CDTFA-provided boundary, even if it extends into the ocean a small amount. This processing supports consistent boundaries for Fort Bragg, Point Arena, San Francisco, Pacifica, Half Moon Bay, and Capitola, in addition to others. More information on this algorithm will be provided soon.Coastline CaveatsSome cities have buffers extending into water bodies that we do not cut at the shoreline. These include South Lake Tahoe and Folsom, which extend into neighboring lakes, and San Diego and surrounding cities that extend into San Diego Bay, which our shoreline encloses. If you have feedback on the exclusion of these items, or others, from the shoreline cuts, please reach out using the contact information above.Offline UseThis service is fully enabled for sync and export using Esri Field Maps or other similar tools. Importantly, the GlobalID field exists only to support that use case and should not be used for any other purpose (see note in field descriptions).Updates and Date of ProcessingConcurrent with CDTFA updates, approximately every two weeks, Last Processed: 12/17/2024 by Nick Santos using code path at https://github.com/CDT-ODS-DevSecOps/cdt-ods-gis-city-county/ at commit 0bf269d24464c14c9cf4f7dea876aa562984db63. It incorporates updates from CDTFA as of 12/12/2024. Future updates will include improvements to metadata and update frequency.

Use GTFS schedule trips, stop_times, shapes, and stops to estimate whether corridor segments have scheduled headways of 20 minutes or less.

The PORT_BND feature class is a polygon feature class representing port boundaries in California. The PORT_BND feature class was created by transferring the linework from port maps submitted by various ports onto the Caltrans County Maps and then digitized.

Major Highways - Used to analyze transportation needs and alternatives for the Lake Tahoe Region.County Roads - Used to analyze transportation needs and alternatives for the Lake Tahoe Region.Streets - Geocoded streets (The best available streets layer for the Lake Tahoe region).Existing Active Transportation Facilities - Bikeway class designation.Existing Active Transportation Facilities - 75ft buffer - A 75 foot buffer around existing active transportation network segments. Proposed Active Transportation Facilities - Proposed Bikeway class designation.Proposed Active Transportation Facilities - 75ft buffer - A 75 foot buffer around proposed active transportation network segments. Tahoe Transit Routes (Consolidated) - Transit routes throughout the Lake Tahoe Region.Microtransit Service Areas - Area of service covered by Lake Link and TART Connect.2020 Regional Transportation Plan Projects - Plan Projects (link to plan)Traffic Analysis Zones (TAZ) - The purpose for these boundaries is to provide zones to analyze transportation needs and alternatives for the Lake Tahoe Region to meet the Tahoe Regional Planning Agency thresholds, as well as conform to local, state, and federal regulations.Tahoe Bus Stops - Transit stops throughout the Lake Tahoe Region.Traffic Volumes – Crashes as reported by CalTrans and NDOT. Measured by average annual daily traffic (AADT).Tahoe Crashes - Collision data reported by CalTrans and NDOT.

Spatial Reference: NAD83 / UTM zone 10N (26910) Area Covered: Tahoe Basin, Nevada, California

Adopted and Proposed Scenic Highways from the State of California Department of Transportation (Caltrans), specific to the UNINCORPORATED areas of Los Angeles County.SOURCE: Caltrans; https://dot.ca.gov/programs/design/lap-landscape-architecture-and-community-livability/lap-liv-i-scenic-highwaysUPDATED: 4/20/17 for a newly adopted scenic highway.NEED MORE FUNCTIONALITY? If you are looking for more layers or advanced tools and functionality, then try our suite of GIS Web Mapping Applications.