Documentation of QGIS Python plugin brdrQ: FeatureAligner

Instructions

  1. Select the thematic layer you want to align.
  2. Select a feature from the list or via ‘Select feature on map’.
  3. View the prediction(s) for this aligned feature.

Additionally, you can:

  • Switch between multiple predictions (via list, slider, or spinbox).
  • Request a ‘plot’ of these predictions (relevant distance (m) vs. change (m²)).
  • Visualize the predicted relevant distances side by side.
  • Adjust the original geometry to the chosen prediction.
  • Reset the original geometry (only within a feature session, so if no other feature is selected).

Settings

  • Choice of the reference layer you want to align to (default ADP - current GRB parcels).
  • Choice of ‘Public Domain’ Strategy (exclude or include the Public Domain).
  • Processor: Choice of processing-algorithm. Best to use AlignerGeometryProcessor, as this is a wrapper that chooses the fastest available algorithm based on geometry-types: DieussaertGeometryProcessor for Polygon-to-Polygon and NetworkGeometryProcessor for all other geometry-type-combinations.
  • Threshold_overlap_percentage (default 50): fallback value for the algorithm if no relevant areas are detected.
  • Maximum relevant distance: Maximum distance (in meters) that can be used to search for predictions. (Prediction deviates at most by this value from the original).
  • Add brdr_formula: A field with a descriptive formula of the geometry is added to the result.
  • Evaluation Strategy FULL: Choice that determines the score of the predictions based on a full overlap with reference polygons:
    • ONLY_FULL: Only predictions with a full reference overlap are shown.
    • PREFER_FULL: Predictions with a full reference overlap get a higher score, others are still shown.
    • NO_FULL: No distinction is made between predictions with or without full reference overlap.