calc_lat_long

A package to calculate distance between two cordinate points Latitude and Longitude by Miles or Nautical Miles or Kilometers.

Getting Started

  1. Add the latest version of package to your pubspec.yaml (and run dart pub get);
depencencies:
  calc_lat_long: ^1.0.7

Example

There are a number of properties that you can modify:

  • Latitude1

  • Longitude1

  • Latitude2

  • Longitude2

  • Enum UnitLength.km mi, km, nm (miles, kilometers, nautical miles)


Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: EdgeInsets.all(16),
        child: ListView(
          keyboardDismissBehavior: ScrollViewKeyboardDismissBehavior.onDrag,
          children: <Widget>[
            TextField(
              controller: latitude1,
              decoration: InputDecoration(labelText: "Latitude 1"),
            ),
            TextField(
              controller: longitude1,
              decoration: InputDecoration(labelText: "Longitude 1"),
            ),
            TextField(
              controller: latitude2,
              decoration: InputDecoration(labelText: "Latitude 2"),
            ),
            TextField(
              controller: longitude2,
              decoration: InputDecoration(labelText: "Longitude 2"),
            ),
            DropdownButton<UnitLength>(
                items: _unitLength.map((UnitLength dropDownStringItem) {
                  return DropdownMenuItem<UnitLength>(
                    value: dropDownStringItem,
                    child: Text(dropDownStringItem.toString()),
                  );
                }).toList(),
                onChanged: (UnitLength newUnitSelected) {
                  _dropDownItemSelected(newUnitSelected);
                  setState(() {
                    _selectedUnit = newUnitSelected;
                  });
                },
                value: _selectedUnit),
            SizedBox(
              height: 15,
            ),
            ElevatedButton(
                onPressed: () {
                  /// Here you must pass your coordinates following by Latitude 1, Latitude 2, Logintude 1, Longitude 2
                  var dist = CalcDistance.distance(
                      num.parse(latitude1.text),
                      num.parse(latitude2.text),
                      num.parse(longitude1.text),
                      num.parse(longitude2.text),
                      _selectedUnit);

                  setState(() {
                    distance = dist;
                  });
                },
                child: Text("Calculate")),
            SizedBox(
              height: 15,
            ),
            Text(distance == 0 ? "" : "Distance: $distance")
          ],
        ),
      )
    );
  }

Libraries

calc_lat_long
UnitLengthEnum