latlong 0.6.1

  • README.md
  • CHANGELOG.md
  • Installing
  • Versions
  • 93

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!

LatLong

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

Basic usage #

Distance #

    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 = 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)
    print(p2.round());
    
    // 45° 13' 11.45" S, 0° 0' 0.00" O
    print(p2.toSexagesimal());
            

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 (office@mikemitterer.at),
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

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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

Unreleased #

Refactor #

v0.5 - 2018-06-06

Refactor #

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 CHANGELOG.md 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:


dependencies:
  latlong: ^0.6.1

2. Install it

You can install packages from the command line:

with pub:


$ pub get

with Flutter:


$ flutter packages get

Alternatively, your editor might support pub get or flutter packages 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...

Popularity:
Describes how popular the package is relative to other packages. [more]
95
Health:
Code health derived from static analysis. [more]
92
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
90
Overall:
Weighted score of the above. [more]
93
Learn more about scoring.

We analyzed this package on Apr 17, 2019, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.2.0
  • pana: 0.12.14

Platforms

Detected platforms: Flutter, web, other

No platform restriction found in primary library package:latlong/latlong.dart.

Health suggestions

Fix lib/latlong/Distance.dart. (-3.93 points)

Analysis of lib/latlong/Distance.dart reported 8 hints, including:

line 42 col 44: Use = to separate a named parameter from its default value.

line 42 col 87: Use = to separate a named parameter from its default value.

line 46 col 33: Use = to separate a named parameter from its default value.

line 46 col 76: Use = to separate a named parameter from its default value.

line 132 col 52: Use = to separate a named parameter from its default value.

Fix lib/latlong/LatLng.dart. (-1.99 points)

Analysis of lib/latlong/LatLng.dart reported 4 hints:

line 37 col 5: Avoid return types on setters.

line 43 col 5: Avoid return types on setters.

line 74 col 38: Use = to separate a named parameter from its default value.

line 80 col 59: Use = to separate a named parameter from its default value.

Fix lib/latlong/Path.dart. (-1.49 points)

Analysis of lib/latlong/Path.dart reported 3 hints:

line 56 col 39: Use = to separate a named parameter from its default value.

line 59 col 75: Use = to separate a named parameter from its default value.

line 98 col 75: Use = to separate a named parameter from its default value.

Fix additional 8 files with analysis or formatting issues. (-1 points)

Additional issues in the following files:

  • lib/latlong.dart (1 hint)
  • lib/latlong/Circle.dart (1 hint)
  • lib/latlong/LengthUnit.dart (Run dartfmt to format lib/latlong/LengthUnit.dart.)
  • lib/latlong/calculator/Haversine.dart (Run dartfmt to format lib/latlong/calculator/Haversine.dart.)
  • lib/latlong/calculator/Vincenty.dart (Run dartfmt to format lib/latlong/calculator/Vincenty.dart.)
  • lib/latlong/interfaces.dart (Run dartfmt to format lib/latlong/interfaces.dart.)
  • lib/spline.dart (Run dartfmt to format lib/spline.dart.)
  • lib/spline/CatmullRomSpline.dart (Run dartfmt to format lib/spline/CatmullRomSpline.dart.)

Maintenance suggestions

Maintain an example. (-10 points)

Create a short demo in the example/ directory to show how to use this package.

Common filename patterns include main.dart, example.dart, and latlong.dart. Packages with multiple examples should provide example/README.md.

For more information see the pub package layout conventions.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0 <3.0.0
console_log_handler >=1.1.0 <2.0.0 1.1.6
intl >=0.15.0 <1.0.0 0.15.8
logging >=0.11.3 <1.0.0 0.11.3+2
validate ^1.0.0 1.7.0
Transitive dependencies
ansicolor 1.0.2
path 1.6.2
Dev dependencies
build_runner any
build_test any
build_web_compilers any
test any