latlong 0.4.1

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  • 48

LatLong provides a lightweight library for common latitude and longitude calculation. #

This library supports both, the "Haversine" and the "Vincenty" algorithm.

"Haversine" is a bit faster but "Vincenty" is far more accurate!


Catmull-Rom algorithm is used for smoothing out the path.

Basic usage #

Distance #

    final Distance distance = new Distance();
    // km = 423
    final int km =,
     new LatLng(52.518611,13.408056),new LatLng(51.519475,7.46694444));
    // meter = 422591.551
    final int meter = distance(
        new LatLng(52.518611,13.408056),
        new LatLng(51.519475,7.46694444)

Offset #

    final Distance distance = const Distance();
    final num distanceInMeter = (EARTH_RADIUS * math.PI / 4).round();
    final p1 = new LatLng(0.0, 0.0);
    final p2 = distance.offset(p1, distanceInMeter, 180);
    // LatLng(latitude:-45.219848, longitude:0.0)
    // 45° 13' 11.45" S, 0° 0' 0.00" O

Path smoothing #

    // zigzag is a list of coordinates
    final Path path = new Path.from(zigzag);
    // Result is below
    final Path steps = path.equalize(8,smoothPath: true);

Smooth path

Features and bugs #

Please file feature requests and bugs at the issue tracker.

License #

Copyright 2015 Michael Mitterer (,
IT-Consulting and Development Limited, Austrian Branch

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
either express or implied. See the License for the specific language
governing permissions and limitations under the License.

If this plugin is helpful for you - please (Circle) me or star this repo here on GitHub

Change Log for latlong #

Lightweight library for common latitude and longitude calculation

v0.3.4 - 2016-11-16

Docs #

v0.3.3 - 2016-04-18

Docs #

v0.3.2 - 2016-02-04

Feature #

  • Path.equalize excepts now a num instead of int 108431b

v0.3.1 - 2016-02-03

Feature #

v0.3.0 - 2016-01-29

Feature #

  • CatmullRom added for Path-Finding ebeeb2c
  • Algorithms got their own class f8a661f

Docs #

v0.2.0 - 2016-01-26

Feature #

  • Circle#isInside Polygon#center cce0a4d

v0.1.1 - 2016-01-25

Docs #

This was generated with Changelog for Dart

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  latlong: ^0.4.1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:latlong/latlong.dart';
Version Uploaded Documentation Archive
0.6.1 Aug 29, 2018 Go to the documentation of latlong 0.6.1 Download latlong 0.6.1 archive
0.5.3 Jun 6, 2018 Go to the documentation of latlong 0.5.3 Download latlong 0.5.3 archive
0.4.5 Dec 13, 2017 Go to the documentation of latlong 0.4.5 Download latlong 0.4.5 archive
0.4.3 Dec 13, 2017 Go to the documentation of latlong 0.4.3 Download latlong 0.4.3 archive
0.4.1 Dec 13, 2017 Go to the documentation of latlong 0.4.1 Download latlong 0.4.1 archive
0.3.4 Nov 16, 2016 Go to the documentation of latlong 0.3.4 Download latlong 0.3.4 archive
0.3.3 Oct 13, 2016 Go to the documentation of latlong 0.3.3 Download latlong 0.3.3 archive
0.3.2 Feb 4, 2016 Go to the documentation of latlong 0.3.2 Download latlong 0.3.2 archive
0.3.1 Feb 3, 2016 Go to the documentation of latlong 0.3.1 Download latlong 0.3.1 archive
0.3.0 Jan 29, 2016 Go to the documentation of latlong 0.3.0 Download latlong 0.3.0 archive

All 15 versions...

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The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

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Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see

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Make sure dartdoc successfully runs on your package's source files. (-10 points)

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Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.8.0 <2.0.0