Snapping

You may have noticed that it is easy to draw features that don't line up nicely with existing features. In addition, when modifying features, we can break topology — adding a void between polygons that were previously adjacent. The Snap interaction can be used to help preserve topology while drawing and editing features.

First, import the Snap interaction into your main.js:

import Snap from 'ol/interaction/Snap';

As with the other editing interactions, we'll configure the snap interaction to work with our vector source and add it to the map:

map.addInteraction(
  new Snap({
    source: source,
  })
);

With the draw, modify, and snap interactions all active, we can edit data while maintaining topology.

Uniting nations with the snap interaction
Uniting nations with the snap interaction

results matching ""

    No results matching ""