This package allows you to convert WGS 84 Latitude and Longitude to Hong Kong Grid 1980 Easting and Northing.
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dependencies: flutter: sdk: flutter flutter_hkgrid80_wgs84_converter: git: url: git://github.com/lowkahonn/flutter_hkgrid80_wgs84_converter ref: master
package:flutter_hkgrid80_wgs84_converter/flutter_hkgrid80_wgs84_converter.dart, and use
Converter.convert to convert between the two systems.
Note: This converter is up to 1e-5% error.
import 'package:flutter_hkgrid80_wgs84_converter/flutter_hkgrid80_wgs84_converter.dart'; final coordinate = new Coordinate( x: 834349.252, y: 815894.556, lat: 22.281927, lng: 114.158256 ); // from x y to lat long Coordinate latLng = Converter.convert.gridToLatLng(coordinate); print(latLng.lat.toString()); // 22.281930012478536 print(latLng.lng.toString()); // 114.15824821181121 // from lat long to x y Coordinate xy = Converter.convert.latLngToGrid(coordinate); print(xy.x.toString()); // 834350.1488648592 print(xy.y.toString()); // 815894.2762260285
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