navibyte / geospatial_demos Goto Github PK

Format geographic coordinates as string representations (DD, DM, DMS):

```dart
  const p = Geographic(lat: 51.4778, lon: -0.0014);

  // all three samples print decimal degrees: 51.4778°N 0.0014°W
  print(p.latLonDms(separator: ' '));
  print('${p.latDms()} ${p.lonDms()}');
  print('${Dms().lat(51.4778)} ${Dms().lon(-0.0014)}');

  // prints degrees and minutes: 51°28.668′N, 0°00.084′W
  const dm = Dms(type: DmsType.degMin, decimals: 3);
  print(p.latLonDms(format: dm));

  // prints degrees, minutes and seconds: 51° 28′ 40″ N, 0° 00′ 05″ W
  const dms = Dms.narrowSpace(type: DmsType.degMinSec);
  print(p.latLonDms(format: dms));

  // 51 degrees 28 minutes 40 seconds to N, 0 degrees 0 minutes 5 seconds to W
  const dmsTextual = Dms(
    type: DmsType.degMinSec,
    separator: ' ',
    decimals: 0,
    zeroPadMinSec: false,
    degree: ' degrees',
    prime: ' minutes',
    doublePrime: ' seconds to',
  );
  print(p.latLonDms(format: dmsTextual));

  // Parses box from decimal degrees (DD) with cardinal direction symbols.
  final box =
      GeoBox.parseDms(west: '20°W', south: '50°N', east: '20°E', north: '60°N');

  // prints degrees and minutes: 20°0′W 50°0′N, 20°0′E 60°0′N
  const dm0 = Dms(type: DmsType.degMin, decimals: 0, zeroPadMinSec: false);
  print('${box.westDms(dm0)} ${box.southDms(dm0)}'
      ' ${box.eastDms(dm0)} ${box.northDms(dm0)}');