100+ datasets found
  1. d

    500 Cities: City Boundaries

    • catalog.data.gov
    • healthdata.gov
    • +5more
    Updated Feb 3, 2025
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    Centers for Disease Control and Prevention (2025). 500 Cities: City Boundaries [Dataset]. https://catalog.data.gov/dataset/500-cities-city-boundaries
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    Dataset updated
    Feb 3, 2025
    Dataset provided by
    Centers for Disease Control and Prevention
    Description

    This city boundary shapefile was extracted from Esri Data and Maps for ArcGIS 2014 - U.S. Populated Place Areas. This shapefile can be joined to 500 Cities city-level Data (GIS Friendly Format) in a geographic information system (GIS) to make city-level maps.

  2. N

    Zoning GIS Data: Geodatabase

    • data.cityofnewyork.us
    • data.ny.gov
    application/rdfxml +5
    Updated Jan 29, 2013
    + more versions
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    Department of City Planning (DCP) (2013). Zoning GIS Data: Geodatabase [Dataset]. https://data.cityofnewyork.us/City-Government/Zoning-GIS-Data-Geodatabase/mm69-vrje
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    csv, application/rssxml, xml, application/rdfxml, json, tsvAvailable download formats
    Dataset updated
    Jan 29, 2013
    Dataset authored and provided by
    Department of City Planning (DCP)
    Description

    This data set consists of 6 classes of zoning features: zoning districts, special purpose districts, special purpose district subdistricts, limited height districts, commercial overlay districts, and zoning map amendments.

    All previously released versions of this data are available at BYTES of the BIG APPLE - Archive.

  3. 500 Cities: City-level Data (GIS Friendly Format), 2019 release

    • catalog.data.gov
    • data.virginia.gov
    • +5more
    Updated Jun 28, 2025
    + more versions
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    Centers for Disease Control and Prevention (2025). 500 Cities: City-level Data (GIS Friendly Format), 2019 release [Dataset]. https://catalog.data.gov/dataset/500-cities-city-level-data-gis-friendly-format-2019-release
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    Dataset updated
    Jun 28, 2025
    Dataset provided by
    Centers for Disease Control and Preventionhttp://www.cdc.gov/
    Description

    2017, 2016. Data were provided by the Centers for Disease Control and Prevention (CDC), Division of Population Health, Epidemiology and Surveillance Branch. The project was funded by the Robert Wood Johnson Foundation (RWJF) in conjunction with the CDC Foundation. 500 cities project city-level data in GIS-friendly format can be joined with city spatial data (https://chronicdata.cdc.gov/500-Cities/500-Cities-City-Boundaries/n44h-hy2j) in a geographic information system (GIS) to produce maps of 27 measures at the city-level. There are 7 measures (all teeth lost, dental visits, mammograms, Pap tests, colorectal cancer screening, core preventive services among older adults, and sleep less than 7 hours) in this 2019 release from the 2016 BRFSS that were the same as the 2018 release.

  4. a

    NDGISHUB City Boundaries

    • gishubdata-ndgov.hub.arcgis.com
    Updated Oct 9, 2012
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    State of North Dakota (2012). NDGISHUB City Boundaries [Dataset]. https://gishubdata-ndgov.hub.arcgis.com/datasets/ndgishub-city-boundaries/about
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    Dataset updated
    Oct 9, 2012
    Dataset authored and provided by
    State of North Dakota
    Area covered
    Description

    12/06/2024 - Updates to Ellendale, Fargo, Kindred, Lincoln, Mandan, Rugby and Tappen.12/06/2024 - Update to Lincoln and Bismarck Corporate Boundaries based on requests from Lincoln.6/27/2024 - Update to the Valley City and Dickinson Corporate Boundary based on requests from their GIS personal.4/8/2024 - Update to the Valley City Corporate Boundary12/04/2023 - Update to Fargo City Boundary7/23/2023 - Removed Church’s Ferry due to proclamation and notice of dissolution.7/01/2023 - Changes to Binford - Ordinance 51; Lidgerwood - Ordinance 2022-1; Killdeer Golf Course annexation; Bismarck based on current City of Bismarck GIS boundary9/26/2022 - Changes to Steele boundary per Kidder County 911 coordinator.9/23/2022 - Updates to Grand Forks, Mandan and Fargo7/01/2022 - Updates to Killdeer, Mandan and Williston per State Tax Dept changes. 2/14/2022- Updates to Minot -13th ST SE/31st AVE SE, Updates to Elgin, Horace and St. John.11/16/2021 -Updates to Bismarck, Fargo and Killdeer based on city ordinances.7/2/21 – Changes were made to the City of Bismarck, Fargo and Hillsboro to include local taxing jurisdiction boundary changes from the State Tax Commissioner.5/4/21 - Updates were made to the City of Wahpeton due to an annexation.4/29/21 - Updated Minot and Makoti3/5/21 - Updated an annexation to Arnegard that was submitted to the DOT by Mackenzie's County Public Works GIS Coordinator.1/21/21 - Update to Sentinel Butte per Golden Valley 911 Coordinator7/17/20 - Updates to Bismarck, Linton and Stanley6/1/20 - Updates to Killdeer, New Town and Surrey1/17/2020 - Boundary changes have been updated for Bismarck, Bowman Fargo, Garrison, Linton, and New Salem.3/5/19 - The corporate boundary of Surrey has been updated.12/26/18 - The following corporate boundaries have been updated: Bismarck, Lincoln, Grand Forks, Horace, Casselton, Fargo, Oxbow, Tioga and Stanley.6/19/18 - City of Maza is not incorporated based on the 2011-2013 North Dakota Blue book. Removed Maza.5/14/18 - Updated Dickinson, Watford City, Berthold, Minnewauken, and Cavalier.1/31/18 - Updated Dickinson, Mandan, Minot, Tioga, Devils Lake, Belfield, Washburn, Mohall, Minnewauken, Lincoln, Bismarck and Casselton. 10/24/17 - Updated Watford City and Makoti10/16/17 - The following cities have been updated: Jamestown, Milnor, Bismarck, Carrington, Casselton, Mandan, Minot, Stanley, Larimore, Crosby, and Watford City.1/10/17 - The following cities have been updated: Lehr, Grand Forks, Langdon, Drayton, Flasher, Glen Ullin, Watford City, Zap, Lignite, Hankinson, Beach, Underwood, South Heart, Devils Lake, all cities in Ward County, Cavalier, Bismarck, Lincoln, Fargo, West Fargo, Ayr, Briarwood, Casselton, Davenport, Enderlin, Grandin, Horace, and North River.9/19/16 - Updated the following cities: Watford City, Steele, Richardton, Berthold, Carpio, Burlington, Des Lacs, Donnybrook, Douglas, Kenmare, Makoti, Ryder, Sawyer, and Surrey.6/23/16 - Updated cities are as follows: All cities in Pembina, Morton, Richland, and Williams Counties. The cities of Bismarck, West Fargo, Harwood, Oxbow, Beach, Minot, Stanley, Jamestown, Fargo, Dickinson and New Town.9/28/15 - The following cites have had annexation: Stanley, Bottineau, Minot, Casselton, Belfield and Watford City.7/24/15 - Updated Grafton, Stanley, Bismarck, Williston, Horace, Fargo, Grand Forks, Watford City, Turtle Lake, Leeds, Maxbass and Medora1/16/15 - Updated Grafton, Stanley and Bismarck.11/3/2014 - Updated Bismarck, Mandan, Minot, Stanley, and Watford City7/16/14 - Corporate limits updated include: Mandan, Towner, Fargo, West Fargo, Grand Forks, Bismarck, Bowman, Watford City, Stanley, Tioga, Kenmare, Casselton, Minot, Carrington, Kindred, and Killdeer. The corporate limit updates consisted of receiving from the cities, shape files, CADD files, scanned images of annexations or by converting pdf files into images, rectifying them within ArcGIS, then heads-up digitizing. 7/29/13 - updated Stanley, Williston, Minot, and Bismarck.4/30/13 - updated Williston, Hazen, Minot, Dickinson, Valley City, Velva, Rugby, Bismarck, and Lincoln1/28/13 - updated Valley City, Grand Forks, Bismarck, Williston, Jamestown, Harvey, Mohall, Park River, Ray, Rugby, Stanley, Tioga, Mayville and Glenfield10/9/12 - updated Williston and Dickinson6/20/12 - updated Williston via shapefile from city.3/20/12 - updated Bismarck and Minot10/3/2011 - Edited corporate limits for Bottineau, Grand Forks, Bismarck, Grafton, Fargo, West Fargo, Horace, Dickinson, Williston, Valley City and Devils Lake.2/4/11 - Removed urban areas so only corporate boundaries remain. Removed boolean field named URBAN_AREA. Updated corporate limist in Dickinson and cities with Cass county. 6/24/10 - Stanley, Lincoln, Oakes, Hankinson, Enderlin, Ellendale, Linton, Carrington, Minot, and Kulm corportate limits were changed 6/18/09 - Stanley, Wahpeton, Center, Watford City, Williston, Grand Forks, Killdeer, Beulah, Beach, Hazen, Garrison, Washburn, Bismarck and Lincoln corporate limits were changed 3/24/08 - Added Milton, Drayton, and Cavalier Boudaries updated: Park River 1/16/08 - Boundaries updated: Devils Lake, Glen Ullin, Langdon, Minnewaukan, Northwood, Thompson 2/13/07 - Boundaries updated: Amenia, Arthur, Bismarck, Bottineau, Buffalo, Casstleton, Davenport, Dickinson, Enderlin, Gardner, Grand Forks, Grandin, Harvey, Harvey, Hillsboro, Horace, Hunter, Jamestown, Kindred, Mapleton, Mayville, New Rockford, Oxbox, Page, Prairie Rose, Relies Acres, Tappen, Towner City 1/10/06 - Boundaries updated: Wishek, Fargo, Lincoln, Bottineau, Williston, Grand Forks, Granville, Velva, Stanley, urban areas in Fargo, West Fargo, Bismarck and Mandan. Deleted Larson This data came from the NDDOT's Mapping Section. The original data was digitized from hand scribed maps and registered to the 1:24000 USGS PLSS data. It was converted from a projection (NAD 1983 UTM Zone 14N) to a Geographic coordinate system.

  5. m

    City of Quincy, MA GIS Viewer

    • gis.data.mass.gov
    Updated Mar 18, 2024
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    MassGIS - Bureau of Geographic Information (2024). City of Quincy, MA GIS Viewer [Dataset]. https://gis.data.mass.gov/datasets/city-of-quincy-ma-gis-viewer
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    Dataset updated
    Mar 18, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Quincy, Massachusetts
    Description

    City of Quincy, MA GIS Viewer

  6. c

    City and County Boundaries

    • gis.data.cnra.ca.gov
    • dcat-feed-orgcontactemail-cnra.hub.arcgis.com
    Updated Apr 14, 2022
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    CA Nature Organization (2022). City and County Boundaries [Dataset]. https://gis.data.cnra.ca.gov/datasets/CAnature::city-and-county-boundaries
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    Dataset updated
    Apr 14, 2022
    Dataset authored and provided by
    CA Nature Organization
    License

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

    Area covered
    Description

    This feature class is used for cartographic purposes, for generating statistical data, and for clipping data. Ideally, state and federal agencies should be using the same framework data for common themes such as county boundaries. This layer provides an initial offering as "best available" at 1:24,000 scale for counties.Incorporated cities were merged from the Board of Equalization's 11/16/2021 City and County boundaries dataset. The Cal Fire FRAP County boundaries v 19_1 were maintained for consistency with other use in CA Nature.

  7. V

    500 Cities: City-level Data (GIS Friendly Format), 2018 release

    • data.virginia.gov
    • healthdata.gov
    • +2more
    csv, json, rdf, xsl
    Updated Aug 25, 2023
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    Centers for Disease Control and Prevention (2023). 500 Cities: City-level Data (GIS Friendly Format), 2018 release [Dataset]. https://data.virginia.gov/dataset/500-cities-city-level-data-gis-friendly-format-2018-release
    Explore at:
    xsl, json, rdf, csvAvailable download formats
    Dataset updated
    Aug 25, 2023
    Dataset provided by
    Centers for Disease Control and Prevention
    Description

    2016, 2015. Data were provided by the Centers for Disease Control and Prevention (CDC), Division of Population Health, Epidemiology and Surveillance Branch. The project was funded by the Robert Wood Johnson Foundation (RWJF) in conjunction with the CDC Foundation. 500 cities project city-level data in GIS-friendly format can be joined with city spatial data (https://chronicdata.cdc.gov/500-Cities/500-Cities-City-Boundaries/n44h-hy2j) in a geographic information system (GIS) to produce maps of 27 measures at the city-level. There are 4 measures (high blood pressure, taking high blood pressure medication, high cholesterol, cholesterol screening) in this 2018 release from the 2015 BRFSS that were the same as the 2017 release.

  8. c

    California City Boundaries and Identifiers

    • gis.data.ca.gov
    • data.ca.gov
    • +1more
    Updated Sep 16, 2024
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    California Department of Technology (2024). California City Boundaries and Identifiers [Dataset]. https://gis.data.ca.gov/datasets/california-city-boundaries-and-identifiers
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    Dataset updated
    Sep 16, 2024
    Dataset authored and provided by
    California Department of Technology
    License

    CC0 1.0 Universal Public Domain Dedicationhttps://creativecommons.org/publicdomain/zero/1.0/
    License information was derived automatically

    Area covered
    Description

    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.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.PurposeCity 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 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 Buffers (this dataset)Counties: 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 BuffersWithout Coastal BuffersCity and County AbbreviationsUnincorporated Areas (Coming Soon)Census Designated PlacesCartographic CoastlinePolygonLine source (Coming Soon)Working with Coastal BuffersThe dataset you are currently viewing excludes the coastal buffers for cities and counties that have them in the 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 OFFSHORE and AREA_SQMI to get a version with the correct identifiers.Point of ContactCalifornia Department of Technology, Office of Digital Services, odsdataservices@state.ca.govField and Abbreviation DefinitionsCDTFA_CITY: CDTFA incorporated city nameCDTFA_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 BureauCENSUS_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 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.CDT_CITY_ABBR: Abbreviations of incorporated area names - originally derived from CalTrans Division of Local Assistance and now managed by CDT. Abbreviations are 4 characters. Not present in the county-specific layers.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 countyCENSUS_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.Boundary AccuracyCounty boundaries were originally derived from a 1:24,000 accuracy dataset, with improvements made in some places to boundary alignments based on research into historical records and boundary changes as CDTFA learns of them. City boundary data are derived from pre-GIS tax maps, digitized at BOE and CDTFA, with adjustments made directly in GIS for new annexations, detachments, and corrections. Boundary accuracy within the dataset varies. While CDTFA strives to correctly include or exclude parcels from jurisdictions for accurate tax assessment, this dataset does not guarantee that a parcel is placed in the correct jurisdiction. When a parcel is in the correct jurisdiction, this dataset cannot guarantee accurate placement of boundary lines within or between parcels or rights of way. This dataset also provides no information on parcel boundaries. For exact jurisdictional or parcel boundary locations, please consult the county assessor's office and a licensed surveyor.CDTFA's data is used as the best available source because BOE and CDTFA receive information about changes in jurisdictions which otherwise need to be collected independently by an agency or company to compile into usable map boundaries. CDTFA maintains the best available statewide boundary information.CDTFA'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. 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

  9. K

    US Major Cities (State)

    • koordinates.com
    csv, dwg, geodatabase +6
    Updated Aug 30, 2018
    + more versions
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    US Department of Agriculture (USDA) (2018). US Major Cities (State) [Dataset]. https://koordinates.com/layer/12239-us-major-cities-state/
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    kml, geodatabase, mapinfo tab, csv, mapinfo mif, dwg, geopackage / sqlite, shapefile, pdfAvailable download formats
    Dataset updated
    Aug 30, 2018
    Dataset authored and provided by
    US Department of Agriculture (USDA)
    Area covered
    Description

    Geospatial data about US Major Cities (State). Export to CAD, GIS, PDF, CSV and access via API.

  10. m

    City of Lawrence, MA GIS Viewer

    • gis.data.mass.gov
    Updated Mar 29, 2024
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    MassGIS - Bureau of Geographic Information (2024). City of Lawrence, MA GIS Viewer [Dataset]. https://gis.data.mass.gov/datasets/city-of-lawrence-ma-gis-viewer
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    Dataset updated
    Mar 29, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Lawrence, Massachusetts
    Description

    City of Lawrence, MA GIS Viewer

  11. f

    Travel time to cities and ports in the year 2015

    • figshare.com
    tiff
    Updated May 30, 2023
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    Andy Nelson (2023). Travel time to cities and ports in the year 2015 [Dataset]. http://doi.org/10.6084/m9.figshare.7638134.v4
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    tiffAvailable download formats
    Dataset updated
    May 30, 2023
    Dataset provided by
    figshare
    Authors
    Andy Nelson
    License

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

    Description

    The dataset and the validation are fully described in a Nature Scientific Data Descriptor https://www.nature.com/articles/s41597-019-0265-5

    If you want to use this dataset in an interactive environment, then use this link https://mybinder.org/v2/gh/GeographerAtLarge/TravelTime/HEAD

    The following text is a summary of the information in the above Data Descriptor.

    The dataset is a suite of global travel-time accessibility indicators for the year 2015, at approximately one-kilometre spatial resolution for the entire globe. The indicators show an estimated (and validated), land-based travel time to the nearest city and nearest port for a range of city and port sizes.

    The datasets are in GeoTIFF format and are suitable for use in Geographic Information Systems and statistical packages for mapping access to cities and ports and for spatial and statistical analysis of the inequalities in access by different segments of the population.

    These maps represent a unique global representation of physical access to essential services offered by cities and ports.

    The datasets travel_time_to_cities_x.tif (where x has values from 1 to 12) The value of each pixel is the estimated travel time in minutes to the nearest urban area in 2015. There are 12 data layers based on different sets of urban areas, defined by their population in year 2015 (see PDF report).

    travel_time_to_ports_x (x ranges from 1 to 5)

    The value of each pixel is the estimated travel time to the nearest port in 2015. There are 5 data layers based on different port sizes.

    Format Raster Dataset, GeoTIFF, LZW compressed Unit Minutes

    Data type Byte (16 bit Unsigned Integer)

    No data value 65535

    Flags None

    Spatial resolution 30 arc seconds

    Spatial extent

    Upper left -180, 85

    Lower left -180, -60 Upper right 180, 85 Lower right 180, -60 Spatial Reference System (SRS) EPSG:4326 - WGS84 - Geographic Coordinate System (lat/long)

    Temporal resolution 2015

    Temporal extent Updates may follow for future years, but these are dependent on the availability of updated inputs on travel times and city locations and populations.

    Methodology Travel time to the nearest city or port was estimated using an accumulated cost function (accCost) in the gdistance R package (van Etten, 2018). This function requires two input datasets: (i) a set of locations to estimate travel time to and (ii) a transition matrix that represents the cost or time to travel across a surface.

    The set of locations were based on populated urban areas in the 2016 version of the Joint Research Centre’s Global Human Settlement Layers (GHSL) datasets (Pesaresi and Freire, 2016) that represent low density (LDC) urban clusters and high density (HDC) urban areas (https://ghsl.jrc.ec.europa.eu/datasets.php). These urban areas were represented by points, spaced at 1km distance around the perimeter of each urban area.

    Marine ports were extracted from the 26th edition of the World Port Index (NGA, 2017) which contains the location and physical characteristics of approximately 3,700 major ports and terminals. Ports are represented as single points

    The transition matrix was based on the friction surface (https://map.ox.ac.uk/research-project/accessibility_to_cities) from the 2015 global accessibility map (Weiss et al, 2018).

    Code The R code used to generate the 12 travel time maps is included in the zip file that can be downloaded with these data layers. The processing zones are also available.

    Validation The underlying friction surface was validated by comparing travel times between 47,893 pairs of locations against journey times from a Google API. Our estimated journey times were generally shorter than those from the Google API. Across the tiles, the median journey time from our estimates was 88 minutes within an interquartile range of 48 to 143 minutes while the median journey time estimated by the Google API was 106 minutes within an interquartile range of 61 to 167 minutes. Across all tiles, the differences were skewed to the left and our travel time estimates were shorter than those reported by the Google API in 72% of the tiles. The median difference was −13.7 minutes within an interquartile range of −35.5 to 2.0 minutes while the absolute difference was 30 minutes or less for 60% of the tiles and 60 minutes or less for 80% of the tiles. The median percentage difference was −16.9% within an interquartile range of −30.6% to 2.7% while the absolute percentage difference was 20% or less in 43% of the tiles and 40% or less in 80% of the tiles.

    This process and results are included in the validation zip file.

    Usage Notes The accessibility layers can be visualised and analysed in many Geographic Information Systems or remote sensing software such as QGIS, GRASS, ENVI, ERDAS or ArcMap, and also by statistical and modelling packages such as R or MATLAB. They can also be used in cloud-based tools for geospatial analysis such as Google Earth Engine.

    The nine layers represent travel times to human settlements of different population ranges. Two or more layers can be combined into one layer by recording the minimum pixel value across the layers. For example, a map of travel time to the nearest settlement of 5,000 to 50,000 people could be generated by taking the minimum of the three layers that represent the travel time to settlements with populations between 5,000 and 10,000, 10,000 and 20,000 and, 20,000 and 50,000 people.

    The accessibility layers also permit user-defined hierarchies that go beyond computing the minimum pixel value across layers. A user-defined complete hierarchy can be generated when the union of all categories adds up to the global population, and the intersection of any two categories is empty. Everything else is up to the user in terms of logical consistency with the problem at hand.

    The accessibility layers are relative measures of the ease of access from a given location to the nearest target. While the validation demonstrates that they do correspond to typical journey times, they cannot be taken to represent actual travel times. Errors in the friction surface will be accumulated as part of the accumulative cost function and it is likely that locations that are further away from targets will have greater a divergence from a plausible travel time than those that are closer to the targets. Care should be taken when referring to travel time to the larger cities when the locations of interest are extremely remote, although they will still be plausible representations of relative accessibility. Furthermore, a key assumption of the model is that all journeys will use the fastest mode of transport and take the shortest path.

  12. a

    California City and County Boundaries

    • hub.arcgis.com
    • gis-calema.opendata.arcgis.com
    Updated Nov 30, 2022
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    CA Governor's Office of Emergency Services (2022). California City and County Boundaries [Dataset]. https://hub.arcgis.com/maps/391744b558df4a75a33b4f52fa690feb
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    Dataset updated
    Nov 30, 2022
    Dataset authored and provided by
    CA Governor's Office of Emergency Services
    License

    MIT Licensehttps://opensource.org/licenses/MIT
    License information was derived automatically

    Area covered
    Description

    This feature service includes change areas for city boundaries and county line adjustments filed in accordance with Government Code 54900. The boundaries in this map are based on the State Board of Equalization's tax rate area maps for the assessment roll year specified in the COFILE field. The information is updated regularly within 10 business days of the most recent BOE acknowledgement date. Some differences may occur between actual recorded boundaries and boundary placement in the tax rate area GIS map. Tax rate area boundaries are representations of taxing jurisdictions for the purpose of determining property tax assessments and should not be used to determine precise city or county boundary line locations. BOE_CityAnx Data Dictionary: COFILE = county number - assessment roll year - file number; CHANGE = affected city, unincorporated county, or boundary correction; EFFECTIVE = date the change was effective by resolution or ordinance; RECEIVED = date the change was received at the BOE; ACKNOWLEDGED = date the BOE accepted the filing for inclusion into the tax rate area system; NOTES: additional clarifying information about the action. BOE_CityCounty Data Dictionary: COUNTY = county name; CITY = city name or unincorporated territory; COPRI = county number followed by the 3-digit city primary number used in the BOE'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).

  13. m

    City of Pittsfield, MA GIS Viewer

    • gis.data.mass.gov
    Updated Mar 22, 2024
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    MassGIS - Bureau of Geographic Information (2024). City of Pittsfield, MA GIS Viewer [Dataset]. https://gis.data.mass.gov/datasets/city-of-pittsfield-ma-gis-viewer
    Explore at:
    Dataset updated
    Mar 22, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Pittsfield, Massachusetts
    Description

    City of Pittsfield, MA GIS Viewer

  14. M

    City, Township, and Unorganized Territory in Minnesota

    • gisdata.mn.gov
    fgdb, gpkg, html +2
    Updated Jun 26, 2025
    + more versions
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    Transportation Department (2025). City, Township, and Unorganized Territory in Minnesota [Dataset]. https://gisdata.mn.gov/dataset/bdry-mn-city-township-unorg
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    jpeg, shp, fgdb, html, gpkgAvailable download formats
    Dataset updated
    Jun 26, 2025
    Dataset provided by
    Transportation Department
    Area covered
    Minnesota
    Description

    This medium-scale (nominally 1:24,000) dataset represents the boundaries of cities, townships, and unorganized territories (CTUs) in Minnesota. The Minnesota Geospatial Information Office created the initial CTU dataset by updating a municipal boundary file maintained by the Minnesota Department of Transportation (MnDOT). Update information was gathered primarily from boundary adjustment records maintained by the Office of Administrative Hearings, Municipal Boundary Adjustment Unit. MnDOT has maintained the file since 2014.

    Note: Cities and Townships represented in this dataset are political (civil) townships as recognized by the State of MN, not congressional or public land survey townships. Unorganized territory subdivisions are those defined by the U.S. Bureau of the Census, which often differ from those defined by a county.

    Check other metadata records in this package for more information on CTUInformation.


    Link to ESRI Feature Service:

    City, Township, and Unorganized Territory in Minnesota: City, Township, and Unorganized Territory


  15. d

    Taichung City Urban Planning Map (GIS)_TWD97

    • data.gov.tw
    csv, json, xml
    Updated Jun 1, 2025
    + more versions
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    Urban Development Bureau, Taichung City Government (2025). Taichung City Urban Planning Map (GIS)_TWD97 [Dataset]. https://data.gov.tw/en/datasets/106823
    Explore at:
    xml, csv, jsonAvailable download formats
    Dataset updated
    Jun 1, 2025
    Dataset authored and provided by
    Urban Development Bureau, Taichung City Government
    License

    https://data.gov.tw/licensehttps://data.gov.tw/license

    Area covered
    Taichung City
    Description

    The digital filing is created from urban planning announcement data provided by the urban development bureau. The fields include number, administrative district, use zone, zone abbreviation, urban planning name, establishment date, area, building coverage ratio, floor area ratio, maximum volume ratio, urban planning area, detailed planning area, remarks, drawing revision date, publication document number, and project name.

  16. u

    Utah City and Town Locations

    • opendata.gis.utah.gov
    • gis-support-utah-em.hub.arcgis.com
    • +1more
    Updated Aug 20, 2015
    + more versions
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    Utah Automated Geographic Reference Center (AGRC) (2015). Utah City and Town Locations [Dataset]. https://opendata.gis.utah.gov/datasets/utah-city-and-town-locations
    Explore at:
    Dataset updated
    Aug 20, 2015
    Dataset authored and provided by
    Utah Automated Geographic Reference Center (AGRC)
    License

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

    Area covered
    Description

    Points representing municipalities, county seats, populated areas, and major junctions for cartographic purposes.

  17. m

    City of Malden, MA GIS Viewer

    • gis.data.mass.gov
    Updated Mar 15, 2024
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    MassGIS - Bureau of Geographic Information (2024). City of Malden, MA GIS Viewer [Dataset]. https://gis.data.mass.gov/datasets/city-of-malden-ma-gis-viewer
    Explore at:
    Dataset updated
    Mar 15, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Massachusetts, Malden
    Description

    City of Malden, MA GIS Viewer

  18. m

    City of Holyoke, MA GIS Viewer

    • gis.data.mass.gov
    Updated Mar 18, 2024
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    MassGIS - Bureau of Geographic Information (2024). City of Holyoke, MA GIS Viewer [Dataset]. https://gis.data.mass.gov/datasets/city-of-holyoke-ma-gis-viewer
    Explore at:
    Dataset updated
    Mar 18, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Holyoke, Massachusetts
    Description

    City of Holyoke, MA GIS Viewer

  19. d

    City Limits

    • catalog.data.gov
    • data.oregon.gov
    • +3more
    Updated Jan 31, 2025
    + more versions
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    Geographic Information Services (GIS) Unit, Oregon Department of Transportation (ODOT) (2025). City Limits [Dataset]. https://catalog.data.gov/dataset/city-limits-0e5f9
    Explore at:
    Dataset updated
    Jan 31, 2025
    Dataset provided by
    Geographic Information Services (GIS) Unit, Oregon Department of Transportation (ODOT)
    Description

    This data represents the State of Oregon city limit boundaries. Each city limit is defined as a continuous area within the statutory boundary of an incorporated city, which is the smallest subdivision of an annexed area. It is represented as spatial data (polygon with label point).

  20. d

    Taichung City, GIS addresses for each month from January to December 2022

    • data.gov.tw
    csv
    Updated Apr 30, 2025
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    (2025). Taichung City, GIS addresses for each month from January to December 2022 [Dataset]. https://data.gov.tw/en/datasets/173413
    Explore at:
    csvAvailable download formats
    Dataset updated
    Apr 30, 2025
    License

    https://data.gov.tw/licensehttps://data.gov.tw/license

    Area covered
    Taichung City
    Description

    Provide data on the GIS address numbers for each month in Taichung City from January to December 2022.

Share
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Centers for Disease Control and Prevention (2025). 500 Cities: City Boundaries [Dataset]. https://catalog.data.gov/dataset/500-cities-city-boundaries

500 Cities: City Boundaries

Explore at:
3 scholarly articles cite this dataset (View in Google Scholar)
Dataset updated
Feb 3, 2025
Dataset provided by
Centers for Disease Control and Prevention
Description

This city boundary shapefile was extracted from Esri Data and Maps for ArcGIS 2014 - U.S. Populated Place Areas. This shapefile can be joined to 500 Cities city-level Data (GIS Friendly Format) in a geographic information system (GIS) to make city-level maps.

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