Centroids as a Service

This application reads a valid GeoJSON file and returns a valid GeoJSON file of centroids.

In the resulting file:

• All properties are retained in the output file.
• Polygon features become points that represent the Polygon's centroid.
• LineString features become points that represent the middle of the LineString.
• Point features do not change.
• I have no idea how this handles MultiPolygons.

If you don't have a GeoJSON file, you can download an example file below. It has two simplified polygons: the state of Utah and the District of Columbia.

Download example file

This is a Flask application that uses the Shapely Python library. It was made by Lyzi Diamond. It is on GitHub. Example data is a subset of the US States 20m GeoJSON file from Eric Celeste's website, derived from US Census Bureau Cartographic Boundary Files.