terrain_points_metrics

This function computes topographic variables from a point cloud<ul>
<li>exposition</li>
<li>altitude</li>
<li>slope.</li>
</ul>Values are computed after fitting a plane to the points. It supposes a 
homogeneous sampling of the plot by points. Points can be cropped on disk if 
center and radius are provided. In case a centre is provided, the altitude 
is computed by bilinear interpolation at the center location 
(<code>rasterize_terrain</code> with <code>tin</code> algorithm), 
otherwise it is the mean of the points altitude range.

Provides functions for forest objects detection, structure metrics
computation, model calibration and mapping with airborne laser scanning:
co-registration of field plots (Monnet and Mermin (2014)
<doi:10.3390/f5092307>); tree detection (method 1 in Eysn et al. (2015)
<doi:10.3390/f6051721>) and segmentation; forest parameters estimation with
the area-based approach: model calibration with ground reference, and maps
export (Aussenac et al. (2023) <doi:10.12688/openreseurope.15373.2>);
extraction of both physical (gaps, edges, trees) and statistical
features useful for e.g. habitat suitability modeling (Glad et al. (2020)
<doi:10.1002/rse2.117>) and forest maturity mapping (Fuhr et al. (2022)
<doi:10.1002/rse2.274>).

Jean-Matthieu Monnet

lidaRtRee

Forest Analysis with Airborne Laser Scanning (LiDAR) Data

Pascal Obstétar

terrain_points_metrics function

<dl><dt>p</dt>
<dd>matrix, data.frame or <code>LAS</code> object with ground point 
coordinates (X, Y, Z). In case of an object which is not LAS, the object is first 
converted.</dd>
<dt>centre</dt>
<dd>vector. x y coordinates of center to extract points inside a disc</dd>
<dt>r</dt>
<dd>numeric. radius of disc</dd></dl>

Arguments

Computation of terrain metrics — terrain_points_metrics

<dl>

<dt>p</dt>
<dd>matrix, data.frame or <code>LAS</code> object with ground point 
coordinates (X, Y, Z). In case of an object which is not LAS, the object is first 
converted.</dd>


<dt>centre</dt>
<dd>vector. x y coordinates of center to extract points inside a disc</dd>


<dt>r</dt>
<dd>numeric. radius of disc</dd>

</dl>

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terrain_points_metrics: Computation of terrain metrics

Description

Usage

Value

Arguments

Examples