mgrs_dart

Utility for converting between WGS84 lat/lng and MGRS coordinates (Dart version of proj4js/mgrs).

Installing

Add mgrs_dart to pubspec.yml (dependencies section), then run pub get to download the new dependencies.

dependencies:
                  mgrs_dart: any # or the latest version on Pub
                

Using

Mgrs_dart has 3 methods

• toPoint, takes an mgrs string, returns an array of [lon,lat]
• forward, takes an array of [lon,lat] and optional accuracy and returns an mgrs string
• inverse, takes an mgrs string and returns a bbox.

import 'package:mgrs_dart/mgrs_dart.dart';
                
                void main() {
                  var point = [-115.08209766323476, 36.236123461597515];
                  var mgrsString = '11SPA7234911844';
                  var accuracy = 5;
                
                  // MGRS string to LonLat (results List<double>)
                  var calculatedPoint = Mgrs.toPoint(mgrsString);
                  print("Mgrs.toPoint('$mgrsString') = $calculatedPoint;");
                  // Mgrs.toPoint('11SPA7234911844') = [-115.08209766323476, 36.236123461597515];
                
                  // LonLat to MGRS string (results String)
                  var calculatedMgrsString = Mgrs.forward(point, accuracy);
                  print("Mgrs.forward($point, $accuracy) = '$calculatedMgrsString';");
                  // Mgrs.forward([-115.08209766323476, 36.236123461597515], 5) = '11SPA7234911844';
                
                  // MGRS string to BBOX  (results List<double>)
                  var calculatedBox = Mgrs.inverse(mgrsString);
                  print("Mgrs.inverse('$mgrsString') = $calculatedBox;");
                  // Mgrs.inverse('11SPA7234911844') = [-115.08209766323476, 36.236123461597515, -115.08208632067898, 36.23613229376363];
                }
                

Author

Mgrs_dart was ported from proj4js/mgrs by Gergely Padányi-Gulyás (@fegyi001) at Ulyssys Ltd, Budapest, Hungary.

Changelog

[2.0.0] - 2021-03-23

• Stable null safety release.

[1.0.1] - 2020-02-26

• Update dependencies.

[1.0.0] - 2020-02-18

• Mgrs.inverse() works: full functionality of proj4js/mgrs covered, hence the major number.

[0.0.1] - 2020-02-18

• Mgrs.toPoint() works
• Mgrs.forward() works