1// 获取当前位置信息的JavaScript示例，带精度
2function getCurrentPosition() {
3  return new Promise((resolve, reject) => {
4    if (!navigator.geolocation) {
5      reject(new Error('您的浏览器不支持地理定位'));
6      return;
7    }
8    
9    navigator.geolocation.getCurrentPosition(
10      (position) => {
11        const locationData = {
12          latitude: position.coords.latitude,
13          longitude: position.coords.longitude,
14          accuracy: position.coords.accuracy // 以米为单位
15        };
16        resolve(locationData);
17      },
18      (error) => {
19        reject(error);
20      },
21      {
22        enableHighAccuracy: true, // 请求最佳可能的精度
23        timeout: 10000,           // 等待位置的时间
24        maximumAge: 0             // 不使用缓存位置
25      }
26    );
27  });
28}
29
30// 使用示例
31async function displayLocation() {
32  try {
33    const location = await getCurrentPosition();
34    console.log(`纬度: ${location.latitude.toFixed(6)}`);
35    console.log(`经度: ${location.longitude.toFixed(6)}`);
36    console.log(`精度: ±${location.accuracy.toFixed(2)} 米`);
37  } catch (error) {
38    console.error(`获取位置时出错: ${error.message}`);
39  }
40}
41

1# 使用geopy进行坐标计算的Python示例
2from geopy.distance import geodesic
3
4def get_distance_between_coordinates(lat1, lon1, lat2, lon2):
5    """
6    计算两个地理坐标之间的距离（以米为单位），
7    使用大圆距离（地球计算的最精确方法）。
8    
9    参数：
10        lat1, lon1: 第一个点的坐标（十进制度）
11        lat2, lon2: 第二个点的坐标（十进制度）
12        
13    返回：
14        两个点之间的距离（以米为单位）
15    """
16    point1 = (lat1, lon1)
17    point2 = (lat2, lon2)
18    
19    # 使用大圆距离（椭球体）方法计算距离
20    distance_meters = geodesic(point1, point2).meters
21    
22    return distance_meters
23
24# 示例用法
25def main():
26    # 示例坐标（纽约市和华盛顿特区）
27    nyc_lat, nyc_lon = 40.7128, -74.0060
28    dc_lat, dc_lon = 38.9072, -77.0369
29    
30    distance = get_distance_between_coordinates(nyc_lat, nyc_lon, dc_lat, dc_lon)
31    print(f"坐标之间的距离: {distance:.2f} 米")
32    print(f"坐标之间的距离: {distance/1000:.2f} 公里")
33
34if __name__ == "__main__":
35    main()
36

1import android.Manifest;
2import android.content.Context;
3import android.content.pm.PackageManager;
4import android.location.Location;
5import android.location.LocationListener;
6import android.location.LocationManager;
7import android.os.Bundle;
8import androidx.core.app.ActivityCompat;
9
10public class GeolocationAccuracyExample {
11    
12    private LocationManager locationManager;
13    private Context context;
14    
15    public GeolocationAccuracyExample(Context context) {
16        this.context = context;
17        this.locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE);
18    }
19    
20    public void startLocationUpdates() {
21        // 检查权限
22        if (ActivityCompat.checkSelfPermission(context, 
23                Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
24            // 处理权限请求
25            return;
26        }
27        
28        // 请求位置更新
29        locationManager.requestLocationUpdates(
30                LocationManager.GPS_PROVIDER,
31                1000,  // 更新的最小时间间隔（毫秒）
32                0,     // 更新的最小距离（米）
33                new LocationListener() {
34                    @Override
35                    public void onLocationChanged(Location location) {
36                        double latitude = location.getLatitude();
37                        double longitude = location.getLongitude();
38                        float accuracy = location.getAccuracy();
39                        
40                        System.out.printf("纬度: %.6f\n", latitude);
41                        System.out.printf("经度: %.6f\n", longitude);
42                        System.out.printf("精度: ±%.2f 米\n", accuracy);
43                    }
44                    
45                    @Override
46                    public void onStatusChanged(String provider, int status, Bundle extras) {}
47                    
48                    @Override
49                    public void onProviderEnabled(String provider) {}
50                    
51                    @Override
52                    public void onProviderDisabled(String provider) {}
53                }
54        );
55    }
56}
57

1import CoreLocation
2
3class GeolocationManager: NSObject, CLLocationManagerDelegate {
4    private let locationManager = CLLocationManager()
5    
6    override init() {
7        super.init()
8        setupLocationManager()
9    }
10    
11    private func setupLocationManager() {
12        locationManager.delegate = self
13        locationManager.desiredAccuracy = kCLLocationAccuracyBest
14        locationManager.requestWhenInUseAuthorization()
15    }
16    
17    func startLocationUpdates() {
18        locationManager.startUpdatingLocation()
19    }
20    
21    func stopLocationUpdates() {
22        locationManager.stopUpdatingLocation()
23    }
24    
25    // MARK: - CLLocationManagerDelegate
26    
27    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
28        guard let location = locations.last else { return }
29        
30        let latitude = location.coordinate.latitude
31        let longitude = location.coordinate.longitude
32        let accuracy = location.horizontalAccuracy
33        
34        print("纬度: \(latitude)")
35        print("经度: \(longitude)")
36        print("精度: ±\(accuracy) 米")
37        
38        // 对于单次更新，您可能希望在接收一个后停止更新
39        // locationManager.stopUpdatingLocation()
40    }
41    
42    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
43        print("位置管理器失败，错误: \(error.localizedDescription)")
44    }
45}
46
47// 用法：
48// let geolocationManager = GeolocationManager()
49// geolocationManager.startLocationUpdates()
50