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

    ECA - Liquefaction Prone Area

    Metadata Updated: March 1, 2026

    Displays areas with liquefaction zones.   A polygon feature class that shows liquefaction zones. Used to implement and regulate the City of Seattle's Environmentally Critical Areas (ECA) policies. This layer was created in 1995 using data obtained from the USGS. Some edits were made to the edges to better coincide with the City's two foot contour data.   Areas of the City subject to ground shaking from seismic hazards that are addressed by Title 22.

    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=447e0c272b0b48fa9dbffc1f6471ac01&sublayer=5
    Data First Published 2026-02-09
    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 0b5fa51a-f4a6-490b-bdd1-9d809af64d5a
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::eca-liquefaction-prone-area
    Metadata Type geospatial
    Old Spatial -122.4308,47.4934,-122.2421,47.7359
    Source Datajson Identifier True
    Source Hash f1e7296bb4c8591e74ed993bb5e8851e8694957bbfeaac1fc439d63836284b78
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4308, 47.4934, -122.4308, 47.7359, -122.2421, 47.7359, -122.2421, 47.4934, -122.4308, 47.4934}

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