Geospatial · Build and fix geometry

Remove Holes

Fills in the holes inside polygons, keeping only the outer boundary.

Also known as: Fill holes

How it works

Pick the Geometry column. Each polygon is rebuilt from its outer ring only, in place. A MultiPolygon is treated part by part and the parts are unioned again, so a part that sat inside another part's hole merges correctly. Points, lines and other non-area shapes pass through unchanged.

Inputs and outputs

Settings

{
  geometryColumn: string
}

Example

A park outline has a lake cut out and you want the footprint including the lake: geometry column geom. Follow with Spatial Measure to get the gross area.

More in Build and fix geometry

• Make Point — Turns longitude and latitude columns into points you can map and use in other spatial nodes.
• Poly Build — Connects ordered points into a line or polygon, or wraps them in a hull or bounding box, optionally one shape per group. For example, GPS points into route lines.
• Make Valid — Repairs broken shapes, such as self-crossing polygons, so later spatial steps don't fail on them.
• Reproject — Converts geometry from one coordinate system to another. Use it before measuring or overlaying layers that come in different projections.
• Poly Split — Breaks multi-part shapes into single parts, one row per part, such as the islands of a country.
• Dissolve — Merges shapes into one, or one per group, so the inner borders disappear. For example, county outlines into one outline per state. To keep totals alongside the shapes, use Aggregate's Union (dissolve).