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

    ECA - Known Slide (Initiation Point)

    Metadata Updated: March 1, 2026

    This group layer includes point, line, and polygon symbology to display the landslide event inventory. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies. This layer includes a more comprehensive collection of slide events maintained by Shannon and Wilson via the Seattle Landslide Study which included slide data through June 1999.  

    The Known Slide layer was most recently updated under SDCI Director's Rule 12-2019.

    For more information about the definition of known slide areas, see Seattle Municipal Code section 25.09.012, Environmentally Critical Areas (ECA) definitions.

    Updates as needed.

    ECA - Known Slide (Affected Property):  A polygon feature class showing landslide event inventory. 

    ECA - Known Slide (Initiation Point): A point feature class showing landslide event inventory. 

    ECA - Known Slide (Scarp):  A line feature class showing landslide event inventory. 

    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 March 1, 2026
    Metadata Updated Date March 1, 2026

    Metadata Source

    Harvested from Seattle JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date March 1, 2026
    Metadata Updated Date March 1, 2026
    Publisher City of Seattle ArcGIS Online
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=f353794bcd1e4ddfa04097c9052e07df&sublayer=2
    Data First Published 2026-01-05
    Data Last Modified 2026-02-17
    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 b5bbe6b0-62fc-4141-9065-64170f2fb02f
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-known-slide-initiation-point
    Metadata Type geospatial
    Old Spatial -122.4161,47.4977,-122.2439,47.7402
    Source Datajson Identifier True
    Source Hash dcd39326f65def2a276dacb4237c3223028549ed36e80916f2fd89e49500fb8c
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4161, 47.4977, -122.4161, 47.7402, -122.2439, 47.7402, -122.2439, 47.4977, -122.4161, 47.4977}

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