5 - Categorize wooded area#

Algorithm ID: hedgetools:cwa

This tool classifies polygon geometries into four categories based on their shape: forests, groves, linear elements, and scattered trees.

Warning

This tool involves heavy processing and can take a long time. For some steps, the progress bar may appear stuck without updating.

Remark

This tool provides an easy way to classify vegetation without requiring specialized knowledge or dependencies. Therefore, the results may be approximate or unexpected.

Parameters#

Label	Name	Type	Description
Input polygon layer	`INPUT`	[vector: polygon]	Polygon vector layer to classify.
Buffer size (meters)	`OPENING`	[numeric: double] Default: 20.0	Morphological opening used to disconnect wide from narrow geometries. Roughly determines the half-width of linear elements.
Forest area threshold (square meters)	`FOREST_AREA`	[numeric: double] Default: 50.0	Compact, non-convex geometries above this threshold are classified as forests.
Grove area threshold (should be lower than forest area threshold) (square meters)	`GROVE_AREA`	[numeric: double] Default: 50.0	Compact, moderately convex geometries above this threshold but below the forest threshold are classified as groves.
Output forest	`FOREST`	[vector: polygon] Default: `[Create temporary layer]`	Output polygon vector layer.
Output linear element	`HEDGE`	[vector: polygon] Default: `[Create temporary layer]`	Output polygon vector layer.
Output grove	`GROVE`	[vector: polygon] Default: `[Create temporary layer]`	Output polygon vector layer.
Output scattered tree	`TREE`	[vector: polygon] Default: `[Create temporary layer]`	Output polygon vector layer.

Outputs#

Label	Name	Type	Description
Output forest	`FOREST`	[vector: polygon]	Polygon vector layer of forests.
Output linear element	`HEDGE`	[vector: polygon]	Polygon vector layer of linear elements.
Output grove	`GROVE`	[vector: polygon]	Polygon vector layer of hedges.
Output scattered tree	`TREE`	[vector: polygon]	Polygon vector layer of scattered trees.