latlong library

Helps with latitude / longitude calculations.

For distance calculations the default algorithm Vincenty is used. Vincenty is a bit slower than Haversine but fare more accurate!

 final Distance distance = new Distance();

 // km = 423
 final int km = distance.as(LengthUnit.Kilometer,
    new LatLng(52.518611,13.408056),new LatLng(51.519475,7.46694444));

 // meter = 422592
 final int meter = distance(new LatLng(52.518611,13.408056),new LatLng(51.519475,7.46694444));

Find more infos on Movable Type Scripts and Movable Type Scripts - Vincenty

Classes

Circle

Circle-base GEO algorithms.

Distance

Calculates the distance between points.

DistanceCalculator

DistanceHaversine

Shortcut for final Distance distance = const Distance(calculator: const Haversine());

DistanceVincenty

Shortcut for final Distance distance = const Distance(calculator: const Vincenty());

Haversine

LatLng

Coordinates in Degrees

LengthUnit

Path<T extends LatLng>

Path of LatLng values

Vincenty

Constants

earthRadius → const double

Earth radius in meter

equatorRadius → const double

Equator radius in meter (WGS84 ellipsoid)

flattening → const double

WGS84

pi → const double

The PI constant.

polarRadius → const double

Polar radius in meter (WGS84 ellipsoid)

Functions

decimal2sexagesimal(double dec) → String

Converts a decimal coordinate value to sexagesimal format

degToRadian(double deg) → double

Converts degree to radian

normalizeBearing(double bearing) → double

Convert a bearing to be within the 0 to +360 degrees range. Compass bearing is in the rangen 0° ... 360°

radianToDeg(double rad) → double

Radian to degree

round(double value, {int decimals = 6}) → double

Rounds value to given number of decimals

sexagesimal2decimal(String str) → double

Converts a string coordinate value in sexagesimal format to decimal

zeroPad(num number) → String

Pads a number with a single zero, if it is less than 10

Typedefs

LatLngFactory = LatLng Function(double latitude, double longitude)

Necessary for creating new instances T extends LatLng (Path