title: $:/plugins/tiddlywiki/geospatial/docs/geodifference
caption: geodifference operator
tags: $:/tags/GeospatialDocs

!! `geodifference` operator

The `geodifference` operator calculates the difference between two or more [[GeoJSON Polygon Features|GeoJSON Polygon Feature]].

Each input list item is interpreted as a [[GeoJSON Polygon Feature Collection]] containing polygons.

```
[geodifference[]]
```

!! Examples

<$testcase>
<$data $compound-tiddler="$:/plugins/tiddlywiki/geospatial/tests/operators/geodifference-interactive"/>
<$data $tiddler="$:/plugins/tiddlywiki/geospatial"/>
</$testcase>