polyfill abstract method
Takes a given coordinates
and resolution
and returns hexagons that
are contained by them.
resolution
must be in the range 0, 15
.
This implementation traces the GeoJSON geofence(s) in cartesian space with hexagons, tests them and their neighbors to be contained by the geofence(s), and then any newly found hexagons are used to test again until no new hexagons are found.
final hexagons = h3.polyfill(
coordinates: const [
GeoCoord(lat: 37.813318999983238, lon: -122.4089866999972145),
GeoCoord(lat: 37.7866302000007224, lon: -122.3805436999997056),
GeoCoord(lat: 37.7198061999978478, lon: -122.3544736999993603),
GeoCoord(lat: 37.7076131999975672, lon: -122.5123436999983966),
GeoCoord(lat: 37.7835871999971715, lon: -122.5247187000021967),
GeoCoord(lat: 37.8151571999998453, lon: -122.4798767000009008),
],
resolution: 9,
)
Implementation
List<BigInt> polyfill({
required List<GeoCoord> coordinates,
required int resolution,
List<List<GeoCoord>> holes,
});