SphericalGreatCircle class

Latitude/longitude points on a spherical model earth, and methods for calculating distances, bearings, destinations, etc on (orthodromic) great-circle paths.

Annotations
  • @immutable

Constructors

SphericalGreatCircle.new(Geographic position)
Create an object calculating distances, bearings, destinations, etc on (orthodromic) great-circle paths with position as the current position.
const

Properties

hashCode → int
The hash code for this object.
no setteroverride
position → Geographic
The current geographic position for calculations.
finalinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

alongTrackDistanceTo({required Geographic start, required Geographic end, double radius = 6371000.0}) → double
Returns how far the current position is along a path from the start point, heading towards the end point.
copyWith({Geographic? position}) → SphericalGreatCircle
Copy this geodetic object with an optional position changed.
crossingParallels({required Geographic other, required double latitude}) → List<double>?
Returns the pair of meridians at which a great circle defined by two points (the current position and other position) crosses the given latitude.
crossTrackDistanceTo({required Geographic start, required Geographic end, double radius = 6371000.0}) → double
Returns (signed) distance from the current position to great circle defined by start and end points.
destinationPoint({required double distance, required double bearing, double radius = 6371000.0}) → Geographic
Returns the destination point from the current position having travelled the given distance on the given initial bearing (bearing normally varies around path followed).
distanceTo(Geographic destination, {double radius = 6371000.0}) → double
Returns the distance along the surface of the earth from the current position to destination.
finalBearingTo(Geographic destination) → double
Returns the final bearing arriving at destination from the current position.
initialBearingTo(Geographic destination) → double
Returns the initial bearing from the current position to destination.
intermediatePointTo(Geographic destination, {required double fraction}) → Geographic
Returns the intermediate point at the given fraction between the current position and destination.
intersectionWith({required double bearing, required Geographic other, required double otherBearing}) → Geographic?
Returns the point of intersection of two paths both defined by a position and a bearing.
maxLatitude({required double bearing}) → double
Returns the maximum latitude reached when travelling on a great circle on the given bearing from the current position.
midPointTo(Geographic destination) → Geographic
Returns the midpoint between the current position and destination.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
toString() → String
A string representation of this object.
override

Operators

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