2.27. Generalization of vector data

Simplification of vector layer features to reduce data volume.


  • A vector layer in ESRI Shape format, compressed(zip)

  • import_snap -

  • iterations -

  • method - метод упрощения, один из: ‘douglas’, ‘douglas_reduction’, ‘lang’, ‘reduction’, ‘reumann’, ‘boyle’, ‘sliding_averaging’, ‘distance_weighting’, ‘chaiken’, ‘hermite’, ‘snakes’, ‘displacement’.

  • threshold - порог упрощения (вводится в метрах)

  • look_ahead -

  • reduction -

  • slide -

  • angle_thresh -

  • alpha -

  • beta -

The result of the process is a layer with simplified features (geometries).

Launch tool: https://toolbox.nextgis.com/operation/generalization

Download an example of source data and result: https://demo.nextgis.com/api/resource/4548/export?zipped=true&format=shp

View the result on an interactive map: https://demo.nextgis.com/resource/4108/display?panel=info

More on startup options: https://grasswiki.osgeo.org/wiki/V.generalize_tutorial