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

    Seattle Tree Canopy 2021 Tree Crowns

    Metadata Updated: February 28, 2025

    This dataset represents tree crowns derived from LiDAR data. Tree crowns are defined as circles that fitted to the approximated radius of a tree's branches and leaves. The tree crowns were derived using LiDAR data. The operation was constrained to those areas of tree canopy, using the tree canopy dataset developed separately for this project, which employed automated techniques coupled with manual editing to extract tree canopy from imagery and LiDAR. Mapping of tree crowns was performed using an automated feature extraction technique that incorporated segmentation and morphology routines. The automated routine first created objects from the tree canopy using an inverse watershed segmentation algorithm applied to the LiDAR nDSM (normalized digital surface model) datasets. These objects were then refined using the spatial properties of the objects. Centroids were computed by finding the geometric center of the tree object. Attributes include the tree height and radius. The height was calculated using the 98th quantile of the LiDAR nDSM height to reduce outlier values. The radius was then calculated from the tree centroid using the formula. This radius was used to derive the tree crowns.For more information, please see the 2021 Tree Canopy Assessment.

    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 8, 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 8, 2023
    Metadata Updated Date February 28, 2025
    Publisher Jarlath O'Neil-Dunne, University of Vermont Spatial Analysis Lab, Director
    Maintainer
    Identifier https://www.arcgis.com/home/item.html?id=15cdc032e4f44957be61cfd07e815d6b&sublayer=0
    Data First Published 2023-06-09
    Data Last Modified 2023-06-09
    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 a940027a-d153-4724-9164-e988af884d1f
    Harvest Source Id f61de7a2-69cf-40a9-a1bc-dd9edb8f3fe5
    Harvest Source Title Seattle JSON
    Homepage URL https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::seattle-tree-canopy-2021-tree-crowns
    Metadata Type geospatial
    Old Spatial -122.4297,47.4933,-122.2426,47.7359
    Source Datajson Identifier True
    Source Hash 180a33d5681af8131c74ddccd5abae31382cec19f7dbaba0f4cc92a2895c0217
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.4297, 47.4933, -122.4297, 47.7359, -122.2426, 47.7359, -122.2426, 47.4933, -122.4297, 47.4933}

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