great_circle_distance 0.0.3 great_circle_distance: ^0.0.3 copied to clipboard
Calculate the great-circle distance on the Earth having a pair of Latitude/Longitude points.
Great-circle distance #
Calculate the great-circle distance on the Earth having a pair of Latitude/Longitude points
The great-circle distance is the shortest distance between two points on the surface of a sphere, measured along the surface of the sphere (as opposed to a straight line through the sphere's interior)
Included in this library:
- Spherical law of cosines
- Haversine formula
- Vincenty` formula (por from the Android implementation)
Disclaimer
: The earth is not quite a sphere. This means that errors(0.3%,0.5% errors) from assuming spherical geometry might be considerable depending on the points; so: don't trust your life on this value
Usage example:
final lat1 = 41.139129;
final lon1 = 1.402244;
final lat2 = 41.139074;
final lon2 = 1.402315;
var gcd = new GreatCircleDistance.fromDegrees(latitude1: lat1, longitude1: lon1, latitude2: lat2, longitude2: lon2);
print('Distance from location 1 to 2 using the Haversine formula is: ${gcd.haversineDistance()}');
print('Distance from location 1 to 2 using the Spherical Law of Cosines is: ${gcd.sphericalLawOfCosinesDistance()}');
print('Distance from location 1 to 2 using the Vicenty`s formula is: ${gcd.vincentyDistance()}');
Check Wikipedia for detailed description on Great-circle distance