Generic Lines
This Subflow provides basic line generalisation capabilities (chaining and simplification). It uses the following parameters:
| Parameter | Description | Default Value |
|---|---|---|
| SimplificationPriority | When a simplification or smoothing algorithm is applied to shared links, the link will be simplified by the feature with the highest priority value. | 1 |
| TopologyPriority |
Priority used during the topological structuring. Lower priority features will be snapped to higher ones. |
1 |
| WeightedEffectiveAreaMinimumArea |
The threshold in square metres for the weighted effective area algorithm. |
150m2 |
| AttributesMustMatch |
Pipe separated list of the names of attributes that must have identical values if two objects are to be chained. |
N/a |
| BreakChainClasses |
Pipe separated list of class names. The chaining will stop at nodes shared by a feature of one these classes. |
N/a |
Steps Used by the Generic Line Subflow
-
Chain Generic Lines
This action chains the line features, so that features only change at junctions (or according to parameter values).
-
Apply Weighted Effective Area On Generic Line Links.
This action simplifies line features, taking care of shared boundaries.
-
Re-apply Weighted Effective Area On Failed Edges.
This reprocesses features that failed to simplify in the previous step.
-
Set Generic Line ID
This action assigns a random unique ID to features which have a null ID.
