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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    ECA Steep Slope

    Metadata Updated: February 28, 2025

    Displays areas with 40% steep slope or greater in the City of Seattle.A polygon feature class showing areas with an incline of 40% or more (10 feet of vertical rise over a horizontal distance of 25 feet or less) with a height of at least 10 feet. This layer was produced using a combination of 2001 LIDAR contours (Puget Sound LIDAR Consortium) and the 1993 topographic contours from aerial photos. The Steep Slope layer was most recently updated under SDCI Director's Rule 12-2019. The steep slope area map is called “advisory” because the mapping is used by the Seattle Department of Construction and Inspections for initial information and screening. Whether or not a site is eventually treated as an environmentally critical area is based on the actual topography of the ground surface. For more information about the definition of steep slope erosion hazard areas, see Seattle Municipal Code section 25.09.012, Environmentally Critical Areas (ECA) definitions. Because of the size of this dataset, we do not recommend trying to download it. Please use as a service. If you need a particular area extracted, please use this form to make a request:<a href='https://forms.office.com/Pages/ResponsePage.aspx?id=RR7meOtrCUCPmTWdi1T0G9zIhm_E9thFiIFY5ws9oKtUQUlNU0hTQ0pGQlhOUDNSOExZQlhXM01INi4u' style='color:rgb(0, 97, 155); text-decoration-line:none; font-family:inherit;' target='_blank' rel='nofollow ugc

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date July 16, 2023
    Metadata Updated Date February 28, 2025

    Metadata Source

    Harvested from Seattle JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date July 16, 2023
    Metadata Updated Date February 28, 2025
    Publisher City of Seattle ArcGIS Online
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=cb49a70f7d834d32ab702ce38c7686e8&sublayer=9
    Data First Published 2023-07-06
    Data Last Modified 2024-08-08
    Category geospatial
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://cos-data.seattle.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id db5d1557-83a7-4ed7-8c53-0dcca4f2e876
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-steep-slope-1
    Metadata Type geospatial
    Old Spatial -122.4279,47.4860,-122.2338,47.7382
    Source Datajson Identifier True
    Source Hash 8ff398a32444b4f97289ccc63fe39cafdfd0ad03abff65c5d8dd48238f5fa6b0
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4279, 47.4860, -122.4279, 47.7382, -122.2338, 47.7382, -122.2338, 47.4860, -122.4279, 47.4860}

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