mosaic_chm_extract: Extracts height metrics and plot quality from a Canopy Height...

In pliman: Tools for Plant Image Analysis

Extracts height metrics and plot quality from a Canopy Height Model (CHM)

Description

This function extracts height-related summary statistics from a CHM using a given shapefile.

Usage

mosaic_chm_extract(chm, shapefile, chm_threshold = NULL)

Arguments

chm	An object computed with mosaic_chm().
shapefile	An sf object containing the polygons over which height metrics are extracted.
chm_threshold	A numeric value representing the height threshold for calculating coverage. If NULL, coverage is not computed.

Value

An sf object containing height summary statistics for each plot, including:

• min: Minimum height value.

• q05: 5th percentile height value.

• q50: Median height value.

• q95: 95th percentile height value.

• max: Maximum height value.

• mean: Mean height value.

• volume: Total sum of heights multiplied by CHM resolution.

• coverage: If a mask is used in mosaic_chm() or chm_threshold is informed, returns the proportion of pixels covered within the plot. Otherwise, returns 1.

pliman documentation built on Aug. 21, 2025, 5:46 p.m.