Web services > LiDAR > Washington (State)--Seattle > 2020-2024

Seattle Tree Canopy 2021 Tree Crowns [Washington (State)--Seattle]

Jarlath O'Neil-Dunne, University of Vermont Spatial Analysis Lab, Director · 2021 Full Details

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Full Details

Title
Seattle Tree Canopy 2021 Tree Crowns [Washington (State)--Seattle]
Description
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 .
Creator
Jarlath O'Neil-Dunne, University of Vermont Spatial Analysis Lab, Director
Temporal Coverage
2021
Date Issued
2023-06-09
Rights
The University of Vermont makes no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data. Although every effort has been made to assure the accuracy of features and their attributes, the University of Vermont is not accountable for any errors or misuse of the data. The data should be used for general mapping purposes only. This item is meant for public access and use. The City of Seattle makes no representation or warranty as to its accuracy, and in particular, its accuracy as to labeling, dimensions, contours, property boundaries, or placement or location of any map feature thereof.
Access Rights
Public
Format
ArcGIS FeatureLayer
Language
English
Date Added
August 10, 2025
Provenance Statement
The metadata for this resource was last retrieved from Seattle GeoData on 2025-08-24.

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  • Citation
    Jarlath O'Neil-Dunne, University of Vermont Spatial Analysis Lab, Director (2023). Seattle Tree Canopy 2021 Tree Crowns [Washington (State)--Seattle]. . https://data-seattlecitygis.opendata.arcgis.com/datasets/SeattleCityGIS::seattle-tree-canopy-2021-tree-crowns (web service)
  • BTAA Geoportal Link

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