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Split by interval

Algorithm ID: hedgetools:splitbyinterval

This tool splits polygons and lines at a specified distance interval. New nodes are created to match the new line extremities. These nodes have the following field values:

Degree	Node type	Description
2	L	Node at the junction of two lines

The primary key (PK) and foreign key (FK) fields in the related layers are automatically updated to reflect the new topology.

Remark

When reaching an extremity of the input line geometry, if the remaining segment is shorter than the specified interval, no additional split is performed.

Warning

The algorithm checks whether the polygon–arc relationship is one-to-one at the end of the process. A warning is raised for polygons that contain either no arc or multiple arcs.

Proceeding without correcting or removing these errors may cause issues in following steps.

When correcting these issues, make sure to update all primary key (PK) and foreign key (FK) fields across the related layers, or run the Update Link algorithm afterwards.

Label	Name	Type	Description
Input polygon layer	INPUT_POLY	[vector: polygon]	Polygon vector layer to be split.
Input arc layer	INPUT_ARC	[vector: line]	Line vector layer representing the median axis of the polygons.
Input node layer	INPUT_NODE	[vector: point]	Point vector layer representing line junctions and extremities.
Node type field	NODE_TYPE	[field: string] Default: node_type	Field storing the node type.
Hedge length (meters)	LENGTH	[numeric: double] Default: 25.0	Interval used to split the hedges along their length.
Output polygon layer	OUTPUT_POLY	[vector: polygon] Default: [Create temporary layer]	Output split polygon vector layer.
Output arc layer	OUTPUT_ARC	[vector: line] Default: [Create temporary layer]	Output split line vector layer.
Output node layer	OUTPUT_NODE	[vector: point] Default: [Create temporary layer]	Output point vector layer.

Outputs

Label	Name	Type	Description
Output polygon layer	OUTPUT_POLY	[vector: polygon]	Split polygon vector layer with updated pid field.
Output arc layer	OUTPUT_ARC	[vector: line]	Split line vector layer with updated pid and eid fields.
Output node layer	OUTPUT_NODE	[vector: point]	Point vector layer containing nodes of degree 2 where the split occurred.