s2geometry_dart 0.0.1

A Dart port of the S2 Geometry Library from JavaScript, providing utilities for geographic calculations and conversions.

example/main.dart

import 'package:s2geometry_dart/s2geometry_dart.dart';

void main(){

  // Define latitude, longitude and level
  var lat = 40.2574448;
  var lng = -111.7089464;
  var level = 15;
  
  // Convert lat, lng, level to key 
  var key = S2.latLngToKey(lat, lng, level);
  print('key: $key');

  // Convert key to id 
  var idFromKey = S2.keyToId(key);
  print('idFromKey: $idFromKey');

  // Convert lat, lng, level to id 
  var idFromLatLng = S2.latLngToId(lat, lng); // level defaults to 15, use 'level = 10' to specify level ex.latLngToId(lat, lng, level = 10)
  print('idFromLatLng: $idFromLatLng');
  

  // Convert id to key
  var keyFromId = S2.idToKey(idFromKey);
  print('keyFromId: $keyFromId');

  //  Convert key to lat, lng, level
  var latLngFromKey = S2.keyToLatLng(key);
  print('latLngFromKey: $latLngFromKey');

  // Convert id to lat, lng, level
  var idToLatLng = S2.idToLatLng(idFromKey);
  print('idToLatLng: $idToLatLng');

  //Get neighbors based on lat, lng, level
  var neighbors = S2.latLngToNeighborKeys(lat, lng, level);
  print('neighbors: $neighbors');
  
  //The next key of the current one
  var nextKey = S2.nextKey(key);
  print('nextKey: $nextKey');

  //The previous key of the current one
  var prevKey = S2.prevKey(key);
  print('prevKey: $prevKey'); 
  
  //step ten keys back 
  var backTenKeys = S2.stepKey(key, -10);
  print('backTenKeys: $backTenKeys'); 

}