Tree Canopy 2024

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GIS File Name

ENVIRONMENTAL_TreeCanopy2024

Description

This dataset represents tree objects derived from LiDAR data. Tree objects are the approximated delineation of a tree's branches and leaves in the source LiDAR data. The mapping of tree objects 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 objects 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). These objects were then refined using the spatial properties of the objects. 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 (Cambridge, MA/P)^0.5.

Purpose

This dataset is designed to be used to represent the location of trees, their height, and associated crown characteristics.

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Last Modified

06-30-2025

Attributes

Name Type Details Description
RADIUS type: Double
width: 8
precision: 38
HEIGHT_FT type: Double
width: 8
precision: 38
SHAPE.STAREA() type: Double
width: 0
precision: 0
SHAPE.STLENGTH() type: Double
width: 0
precision: 0

Coordinate System

NAD 1983 StatePlane Massachusetts Mainland FIPS 2001 Feet

License

This data is made available under the Public Domain Dedication and License v1.0 whose full text can be found at: https://opendatacommons.org/licenses/pddl/1.0/.