PolyUtils class

Polyline and polygon utilities (point-in-polygon, on-path/on-edge tests, Douglas-Peucker simplification, and polyline encoding/decoding), ported from the android-maps-utils PolyUtil class.

Properties

hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited

Static Methods

containsLocationPoly(Point<double> point, List<Point<double>> polygon, {bool geodesic = false}) → bool
Checks whether point is inside polygon on the sphere.
decode(String encodedPath) → List<Point<double>>
Decodes an encoded path string into a sequence of points.
distanceToLine(Point<double> p, Point<double> start, Point<double> end) → double
Computes the distance on the sphere between the point p and the line segment from start to end.
encode(List<Point<double>> path) → String
Encodes a sequence of points into an encoded path string.
isClosedPolygon(List<Point<double>> poly) → bool
Returns true if poly is a closed polygon (i.e., the first and last points are the same).
isLocationOnEdge(Point<double> point, List<Point<double>> polygon, bool geodesic) → bool
Same as isLocationOnEdgeTolerance with a default tolerance of 0.1 meters.
isLocationOnEdgeTolerance(Point<double> point, List<Point<double>> polygon, bool geodesic, double tolerance) → bool
Computes whether the given point lies on or near the edge of a polygon, within a specified tolerance in meters. The polygon edge is composed of great circle segments if geodesic is true, and of Rhumb segments otherwise. The polygon edge is implicitly closed — the closing segment between the first point and the last point is included.
isLocationOnPath(Point<double> point, List<Point<double>> polyline, bool geodesic) → bool
Same as isLocationOnPathTolerance with a default tolerance of 0.1 meters.
isLocationOnPathTolerance(Point<double> point, List<Point<double>> polyline, bool geodesic, double tolerance) → bool
Computes whether the given point lies on or near a polyline, within a specified tolerance in meters. The polyline is composed of great circle segments if geodesic is true, and of Rhumb segments otherwise. The polyline is not closed — the closing segment between the first point and the last point is not included.
locationIndexOnEdgeOrPath(Point<double> point, List<Point<double>> poly, bool closed, bool geodesic, double toleranceEarth) → int
Computes whether (and where) a given point lies on or near a polyline, within a specified toleranceEarth in meters.
locationIndexOnPath(Point<double> point, List<Point<double>> polyline, bool geodesic) → int
Same as locationIndexOnPathTolerance with a default tolerance of 0.1 meters.
locationIndexOnPathTolerance(Point<double> point, List<Point<double>> poly, bool geodesic, double tolerance) → int
Computes whether (and where) a given point lies on or near a polyline, within a specified tolerance in meters.
simplify(List<Point<double>> poly, double tolerance) → List<Point<double>>
Simplifies the given poly (polyline or polygon) using the Douglas-Peucker decimation algorithm. Increasing the tolerance will result in fewer points in the simplified polyline or polygon.