9 datasets found
  1. California US Congressional Districts Map 2020

    • catalog.data.gov
    • data.ca.gov
    • +1more
    Updated Jul 24, 2025
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    California Citizens Redistricting Commission (2025). California US Congressional Districts Map 2020 [Dataset]. https://catalog.data.gov/dataset/california-us-congressional-districts-map-2020
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    Dataset updated
    Jul 24, 2025
    Dataset provided by
    California Citizens Redistricting Commission
    Area covered
    United States, California
    Description

    Final approved map by the 2020 California Citizens Redistricting Commission for California's United States Congressional Districts; the authoritative and official delineations of California's United States Congressional Districts drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.Each of the 52 Congressional districts apportioned to California have an ideal population of 760,066, and the Commission adhered to federal constitutional mandates by requiring a district population deviation of no more than +/- one person. These districts also posed some of the Commission’s biggest challenges, and, because of strict population equality requirements, resulted in many more splits of counties, cities, neighborhoods, and communities of interest compared to State Assembly or Senate plans.

  2. California State Assembly Districts Map 2020

    • catalog.data.gov
    • data.ca.gov
    • +1more
    Updated Jul 24, 2025
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    California Citizens Redistricting Commission (2025). California State Assembly Districts Map 2020 [Dataset]. https://catalog.data.gov/dataset/california-state-assembly-districts-map-2020
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    Dataset updated
    Jul 24, 2025
    Dataset provided by
    California Citizens Redistricting Commission
    Area covered
    California
    Description

    Final approved map by the 2020 California Citizens Redistricting Commission for the California State Assembly; the authoritative and official delineations of the California State Assembly drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.80 Assembly districts have an ideal population of around 500,000 people each, and in consideration of population equality, the Commission chose to limit the population deviation range to as close to zero percent as practicable. With these districts, the Commission was able to respect many local communities of interest and group similar communities; however, it was more difficult to keep densely populated counties, cities, neighborhoods, and larger communities of interest whole due to the district size and correspondingly smaller number allowable in the population deviation percentage.

  3. California State Senate Districts Map 2020

    • catalog.data.gov
    • data.ca.gov
    • +2more
    Updated Jul 24, 2025
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    California Citizens Redistricting Commission (2025). California State Senate Districts Map 2020 [Dataset]. https://catalog.data.gov/dataset/california-state-senate-districts-map-2020
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    Dataset updated
    Jul 24, 2025
    Dataset provided by
    California Citizens Redistricting Commission
    Area covered
    California
    Description

    Final approved map by the 2020 California Citizens Redistricting Commission for the California State Senate; the authoritative and official delineations of the California State Senate drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.Each of the 40 Senate districts has an ideal population of nearly one million people and represents the largest state legislative districts in the nation. In consideration of population equality, the Commission chose to limit the population deviation as close to zero percent as practicable. Per the California Constitution, the Commission strived to nest two Assembly districts where practicable. However, higher ranking criteria made this difficult in practice. While the size of the Senate districts allowed the Commission to recognize broadly shared interests, these interests did not always overlap exactly with the interests of smaller communities recognized in the related Assembly districts. Based on the large number of people in each district, there were a variety of different interests that were balanced and included.

  4. A

    Post World War II Areas

    • data.amerigeoss.org
    • covid19.tempe.gov
    • +11more
    Updated May 21, 2019
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    United States (2019). Post World War II Areas [Dataset]. https://data.amerigeoss.org/ko_KR/dataset/activity/post-world-war-ii-areas-ec0e4
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    zip, geojson, kml, html, arcgis geoservices rest api, csvAvailable download formats
    Dataset updated
    May 21, 2019
    Dataset provided by
    United States
    License

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

    Description
    The contents of this feature layer provide a visual aid for homes constructed during the period between 1945 to 1960. Data supporting the visual aids list which neighborhood these post World War II homes resides in, the style of the homes, along with its condition and integrity.
    The Historic Preservation Office works with the community to preserve these homes by enhancing archaeological, prehistoric, and historic resources throughout the City of Tempe. This work includes a wide range of partnerships with local homeowners, neighborhoods, developers/architects, boards/commissions, state and national agencies, as well as volunteer and non-profit preservation groups


    Contact: Will Duke

    Contact E-Mail: will_duke@tempe.gov

    Contact Phone: N/A

    Link: N/A

    Data Source: SQL Server/ArcGIS Server

    Data Source Type: Geospatial

    Preparation Method: N/A

    Publish Frequency: As information changes

    Publish Method: Automatic


  5. a

    MassDEP 2014 Integrated List of Waters (Feature Service)

    • hub.arcgis.com
    • gis.data.mass.gov
    • +1more
    Updated Jan 26, 2024
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    MassGIS - Bureau of Geographic Information (2024). MassDEP 2014 Integrated List of Waters (Feature Service) [Dataset]. https://hub.arcgis.com/maps/cdfed6a689cb48b2b5f5ac99759ad13c
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    Dataset updated
    Jan 26, 2024
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Description

    The MassDEP Division of Watershed Management (DWM), Watershed Planning Program (WPP) 2014 Integrated List of Waters (305(b)/303(d)) data layer represents the combined reporting elements for the 2014 cycle of both sections 305(b) and 303(d) of the Federal Clean Water Act (CWA). The objective of this statute is to restore and maintain the chemical, physical, and biological integrity of the Nation's waters. As one step toward meeting this goal each state must administer a program to monitor and assess the quality of its surface waters and provide periodic status reports to the U.S. Environmental Protection Agency (EPA), the U.S. Congress, and the public.More details...Map service also available.

  6. VT Water Classifications

    • catalog.data.gov
    • geodata.vermont.gov
    • +8more
    Updated Mar 14, 2025
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    Vermont Agency of Natural Resources (2025). VT Water Classifications [Dataset]. https://catalog.data.gov/dataset/vt-water-classifications-6d229
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    Dataset updated
    Mar 14, 2025
    Dataset provided by
    Vermont Agency Of Natural Resourceshttp://www.anr.state.vt.us/
    Area covered
    Vermont
    Description

    The Vermont Water Quality Standards (VTWQS) are rules intended to achieve the goals of the Vermont Surface Water Strategy, as well as the objective of the federal Clean Water Act which is to restore and maintain the chemical, physical, and biological integrity of the Nation's water. The classification of waters is in included in the VTWQS. The classification of all waters has been established by a combination of legislative acts and by classification or reclassification decisions issued by the Water Resources Board or Secretary pursuant to 10 V.S.A. � 1253. Those waters reclassified by the Secretary to Class A(1), A(2), or B(1) for any use shall include all waters within the entire watershed of the reclassified waters unless expressly provided otherwise in the rule. All waters above 2,500 feet altitude, National Geodetic Vertical Datum, are designated Class A(1) for all uses, unless specifically designated Class A(2) for use as a public water source. All waters at or below 2,500 feet altitude, National Geodetic Vertical Datum, are designated Class B(2) for all uses, unless specifically designated as Class A(1), A(2), or B(1) for any use.

  7. California State Board of Equalization Districts 2020

    • gis.data.ca.gov
    Updated Dec 28, 2021
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    California Department of Tax and Fee Administration (2021). California State Board of Equalization Districts 2020 [Dataset]. https://gis.data.ca.gov/maps/CDTFA::california-state-board-of-equalization-districts-2020-
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    Dataset updated
    Dec 28, 2021
    Dataset authored and provided by
    California Department of Tax and Fee Administrationhttp://cdtfa.ca.gov/
    Area covered
    Description

    Boundaries determined by the 2020 California Citizens Redistricting Commission and derived from We Draw the Lines, released December 2021.Member names and contact information updated as-needed by the Board of Equalization.Final approved map by the 2020 California Citizens Redistricting Commission for the California State Board of Equalization Districts; the authoritative and official delineations of the California State Board of Equalization Districts drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.

    The four Board of Equalization (BOE) districts have a population larger than most other states in the country. In consideration of population equality, the Commission chose to limit the population deviation to under 2%. The BOE is responsible for property tax programs, the alcoholic beverage tax, the tax on insurers, and the private railroad car tax, including conducting appraisals and audits of state-assessed public utility companies and railroad companies, and ensuring statewide uniformity in the assessment of properties by county assessors. Given this, the Commission recognized the relevant shared interests included business and economic interests. In addition, tax revenues are distributed to counties independent of electoral districts. The Commission’s BOE districts reflect a balancing of multiple requirements and interests, including maintaining, to the extent practicable, county, city, neighborhood, and community of interest boundaries. In particular, because the main mission of the BOE focuses on county tax assessment, the Commission attempted to keep counties whole in these districts.

  8. a

    Ky DOW Bioregions

    • hub.arcgis.com
    • data.lojic.org
    • +2more
    Updated Mar 2, 2021
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    KyGovMaps (2021). Ky DOW Bioregions [Dataset]. https://hub.arcgis.com/datasets/9350cd94b55d479bac685ecfbe9a585c
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    Dataset updated
    Mar 2, 2021
    Dataset authored and provided by
    KyGovMaps
    License

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

    Area covered
    Description

    Kentucky has a diverse topography, and analysis of the similarity among biological assemblages across geographic scales can help clarify the inherent biological differences in the state. An a posterioriregional classification scheme based on river basins, physiographic regions and ecoregions has been developed (Pond et al., 2003; Pond and McMurray, 2002; Pond et al., 2000). Bioregions were established to incorporate ecoregion and river basin differences within the state and typically correspond to Level III Ecoregion boundaries (Woods et al., 2002). Due to the strong affinity between fish and river basins, bioregions for fish communities (also called Ichthyoregions) include some finer subdivisions than for macroinvertebrates, algae, and physical habitat (Compton et al., 2003). The bioregions are Mountains (MT; includes Ichthyoregion subdivision Cumberland River above Cumberland Falls, CA), Bluegrass (BG), Mississippi Valley-Interior River (MVIR), and Pennyroyal (PR; includes Ichthyoregion subdivision Upper Green River, GR). Generalized bioregion boundaries are described below. Note that in most cases bioregion boundaries do not follow stream and river networks, so these boundaries should not be considered to be precise in terms of assigning a particular stream segment location. Areas near bioregion boundaries should be examined closely to determine the appropriate classification. A description of the physical, chemical, and biological characteristics of bioregions, as well as guidance for classifying sites in transitional areas can be found in KDOW’s SOP, Bioregions of Kentucky for Water Quality Assessments of Biological Integrity.Mountains (MT) and Cumberland above the Falls (CA)The Mountains bioregion includes all river systems (Big Sandy, Cumberland, Kentucky, Licking, Little Sandy and minor tributaries of the Ohio River) within the boundaries of the Western Allegheny Plateau ecoregion (70) and Central and Southwestern Appalachian ecoregions (69 and 68). Portions of the Central and Southwestern Appalachian ecoregions that are within the Cumberland River system and upstream of Cumberland Falls are categorized as a separate bioregion with respect to fish, Cumberland Above the Falls (CA).Bluegrass (BG) The Bluegrass bioregion includes all river systems (Kentucky, Licking, Salt and minor tributaries of the Ohio River) that lie within sub-ecoregions (Level IV ecoregions) 71d, 71k, and 71l of the Interior Plateau ecoregion (71).Pennyroyal (PR) and Upper Green River (GR)Includes all river systems (Cumberland, Green, Kentucky, Salt, Tradewater, Tennessee and the minor tributaries of the Ohio River) that lie within sub-ecoregions (71a, b, c, e, f, g, and h) of the Interior Plateau (71). The portion of the Green River system that falls within sub-ecoregion (Level IV ecoregion) 71g of the Interior Plateau ecoregion (71) is categorized as a separate bioregion with respect to fish, Upper Green River (GR).Mississippi Valley-Interior River (MVIR) Includes all river systems (lower Cumberland, Green, Tradewater, Tennessee, minor tributaries of the Mississippi River and minor tributaries of the Ohio River) within the boundaries of the Interior River Valleys and Hills (72), Mississippi Alluvial Plain (73), and Mississippi Valley Loess Plain (74).Transitional Areas (TR)Most boundaries between bioregions are not distinct. Watersheds or individual sites near boundaries may exhibit characteristics of more than one bioregion in these zones, or portions of these areas may be classifiable to one or another bioregion. HUC12s are marked as “Transitional” on this map where more than one bioregion is spanned by the HUC12 unit. Additionally, some HUC12 units in far western areas of the Pennyroyal bioregion, in sub-ecoregions 71a and 71f, have been marked as Transitional even though they are wholly within the Pennyroyal. These areas have been observed by KDOW to have varied stream types and some streams here are more similar to the neighboring MVIR bioregion. Assignment of watersheds or sites to bioregions in Transitional areas must be made based on examination of local features. KDOW personnel familiar with the physical, chemical, and biological characteristics of bioregions make these assignments following the SOP “Bioregions of Kentucky for Water Quality Assessments of Biological Integrity “. The column “BioregDesc” in the attributes table indicates which specific bioregions are pertinent in Transitional HUC12 units.CitationsCompton, M.C., G.J. Pond, and J.F. Brumley. 2003. Development and application of the Kentucky Index of Biotic Integrity (KIBI). Kentucky Department for Environmental Protection, Division of Water, Frankfort, KY.Pond, G.J., and S.E. McMurray. 2002. A macroinvertebrate bioassessment index for headwater streams of the Eastern Coalfield Region, Kentucky. Kentucky Department for Environmental Protection, Kentucky Division of Water. Frankfort, KY.Pond, G.J., J.F. Brumley, and R.E. Houp. 2000. Preliminary ordination of stream organisms in Kentucky. Abstract in Bull. North Am. Benthol. Soc. 17(1):448.Pond, G.J., S.M. Call, J.F. Brumley, and M.C. Compton. 2003. The Kentucky macroinvertebrate bioassessment index: derivation of regional narrative ratings for assessing wadeable and headwater streams. Kentucky Dept. for Env. Prot., Kentucky Div. of Water, Frankfort, KY.Woods, A. J., J. M. Omernik, W. H. Martin, G. J. Pond, W.M Andrews, S. M. Call, J.A Comstock, and D. D. Taylor. 2002. Ecoregions of Kentucky (2-sided color poster with map, descriptive text, summary tables, and photographs): Reston, VA, U.S. Geological Survey (map scale 1:1,000,000).

  9. a

    MassDEP 2018/2020 Integrated List of Waters

    • hub.arcgis.com
    • gis.data.mass.gov
    • +2more
    Updated Mar 17, 2022
    + more versions
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    MassGIS - Bureau of Geographic Information (2022). MassDEP 2018/2020 Integrated List of Waters [Dataset]. https://hub.arcgis.com/maps/massgis::massdep-2018-2020-integrated-list-of-waters/about
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    Dataset updated
    Mar 17, 2022
    Dataset authored and provided by
    MassGIS - Bureau of Geographic Information
    Area covered
    Description

    The MassDEP Division of Watershed Management (DWM), Watershed Planning Program’s (WPP) 2018/2020 Integrated List of Waters data layer provides EPA-approved water quality assessment and listing decisions for the 2018/2020 reporting cycle, as required by the Clean Water Act (CWA) under Sections 305(b), 314, and 303(d). The objective of the CWA is to restore and maintain the chemical, physical, and biological integrity of the Nation's waters. As one step toward meeting this goal each state must administer a program to monitor and assess the quality of its surface waters and provide periodic status reports to the U.S. Environmental Protection Agency (EPA).More details...Feature service also available.

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California Citizens Redistricting Commission (2025). California US Congressional Districts Map 2020 [Dataset]. https://catalog.data.gov/dataset/california-us-congressional-districts-map-2020
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California US Congressional Districts Map 2020

Explore at:
Dataset updated
Jul 24, 2025
Dataset provided by
California Citizens Redistricting Commission
Area covered
United States, California
Description

Final approved map by the 2020 California Citizens Redistricting Commission for California's United States Congressional Districts; the authoritative and official delineations of California's United States Congressional Districts drawn during the 2020 redistricting cycle. The Citizens Redistricting Commission for the State of California has created statewide district maps for the State Assembly, State Senate, State Board of Equalization, and United States Congress in accordance, with the provisions of Article XXI of the California Constitution. The Commission has approved the final maps and certified them to the Secretary of State.Line drawing criteria included population equality as required by the U.S. Constitution, the Federal Voting Rights Act, geographic contiguity, geographic integrity, geographic compactness, and nesting. Geography was defined by U.S. Census Block geometry.Each of the 52 Congressional districts apportioned to California have an ideal population of 760,066, and the Commission adhered to federal constitutional mandates by requiring a district population deviation of no more than +/- one person. These districts also posed some of the Commission’s biggest challenges, and, because of strict population equality requirements, resulted in many more splits of counties, cities, neighborhoods, and communities of interest compared to State Assembly or Senate plans.

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