elm package install -y mgold/elm-geojson

A library to decode (and encode) geoJson into a format that's nice to use in Elm. Turn this:

{ "type": "LineString",
  "coordinates": [ [100.0, 0.0], [101.0, 1.0] ],
  "bbox": [-10.0, -10.0, 10.0, 10.0]
}

into this:

(Geometry (LineString [ ( 100, 0, 0 ), ( 101, 1, 0 ) ]), Just [-10, -10, 10, 10])

For more details, see the GeoJson module docs.

npm install -g elm-test
elm test

The test suite includes a fuzz testing that causes testing to take anywhere from half a second to thirty seconds. Very occasionally, it may cause a JS out of memory error.

If you get an actual failing test, please file a bug that includes the seed to reproduce.