Geospatial · Build and fix geometry

Make Valid

Repairs broken shapes, such as self-crossing polygons, so later spatial steps don't fail on them.

Also known as: Fix geometry

How it works

Pick the Geometry column. Each invalid shape (self-intersecting rings, bowties, unclosed rings) is rebuilt as a valid one and replaces the original in the same column; valid shapes pass through untouched. When it runs on the desktop the node counts the repairs and shows a warning such as 3 invalid geometries repaired.

Inputs and outputs

Settings

{
  geometryColumn: string
}

Example

A hand-digitized zone layer makes Spatial Intersection fail. Put Make Valid on the zone input with geometry column geom, and read the warning to see how many shapes needed fixing.

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.
• 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.
• Remove Holes — Fills in the holes inside polygons, keeping only the outer boundary.
• 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).