In this area, public forests are generally managed in a different way compared to private forests, resulting in different forest structures. Ownership is also linked to species composition. This classification could be used as a stratification when calibrating relationships between ALS metrics and forest parameters.
Plots will be attributed to strata based on external GIS layers. The first layer is a vector map of public forests. The following map displays the plots colored based on ownership, after spatial extraction of this information from the polygons of public forests (black borders).
Plots will be attributed to strata based on external GIS layers. The first layer is a vector map of public forests (Forêts publiques, ONF Paris, 2019.) which is available under the [Open Licence Version 2.0](https://www.etalab.gouv.fr/licence-ouverte-open-licence).
The following lines load the public forests layer and intersects it with the plot locations.
The following lines maps the plots with the GIS layer defining the public stratum.
The following map displays the plots colored based on ownership, after spatial extraction of this information from the polygons of public forests (black borders).
<h3>Add stratum information from external data</h3>
<p>In this area, public forests are generally managed in a different way compared to private forests, resulting in different forest structures. Ownership is also linked to species composition. This classification could be used as a stratification when calibrating relationships between ALS metrics and forest parameters.</p>
<p>Plots will be attributed to strata based on external GIS layers. The first layer is a vector map of public forests. The following map displays the plots colored based on ownership, after spatial extraction of this information from the polygons of public forests (black borders).</p>
<p>Plots will be attributed to strata based on external GIS layers. The first layer is a vector map of public forests (Forêts publiques, ONF Paris, 2019.) which is available under the <a href="https://www.etalab.gouv.fr/licence-ouverte-open-licence">Open Licence Version 2.0</a>.</p>
<p>The following lines load the public forests layer and intersects it with the plot locations.</p>
<pre class="r"><code># load GIS layer of public forests
public <- sf::st_read("./data/aba.model/GIS/Public4Montagnes.shp", stringsAsFactors = TRUE,
<p>The following lines maps the plots with the GIS layer defining the public stratum.</p>
<p>The following map displays the plots colored based on ownership, after spatial extraction of this information from the polygons of public forests (black borders).</p>
<pre class="r"><code># project points into map system