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Update link between layers

Algorithm ID: hedgetools:updaterelation

This tool takes a polygon, line, and point layer — typically generated at the end of the Data - Preparation or Data - Transformation steps — and updates the fields that allow geometries to be associated across layers.

It is useful when the topology has been disrupted due to manipulations or error corrections.

Parameters

Label	Name	Type	Description
Input polygon layer	INPUT_POLY	[vector: polygon]	Input polygon vector layer
Input arc layer	INPUT_ARC	[vector: line]	Input line vector layer
Input node layer	INPUT_NODE	[vector: point]	Input node vector layer
Output polygon layer	OUTPUT_POLY	[vector: polygon] Default: [Create temporary layer]	Output polygon vector layer
Output arc layer	OUTPUT_ARC	[vector: line] Default: [Create temporary layer]	Output line vector layer
Output node layer	OUTPUT_NODE	[vector: point] Default: [Create temporary layer]	Output node vector layer

Outputs

Label	Name	Type	Description
Output polygon layer	OUTPUT_POLY	[vector: polygon]	The output polygon vector layer will have updated following link fields: pid: primary key of the polygon
Output arc layer	OUTPUT_ARC	[vector: line]	The output line vector layer will have updated following link fields: pid: foreign key referencing the polygon eid: primary key of the line src_vid: foreign key of one of the nodes at the line’s extremities tgt_vid: foreign key of the other node at the line’s extremities
Output node layer	OUTPUT_NODE	[vector: point]	The output polygon vector layer will have updated following link fields: vid: primary key of the node