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Distance calculation using GPS Coordinates - Haversine formula

Abhijith answered on March 29, 2022 Popularity 5/10 Helpfulness 1/10

answer Distance calculation using GPS Coordinates - Haversine formula

related calculate distance between two coordinates

Distance calculation using GPS Coordinates - Haversine formula

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<?php
// Function to calculate distance between two lat/long points using Haversine formula
function haversineDistance($lat1, $lon1, $lat2, $lon2, $radius = 6371) {
    $lat1 = deg2rad($lat1);
    $lon1 = deg2rad($lon1);
    $lat2 = deg2rad($lat2);
    $lon2 = deg2rad($lon2);

    $dlat = $lat2 - $lat1;
    $dlon = $lon2 - $lon1;

    $a = sin($dlat / 2) * sin($dlat / 2) +
        cos($lat1) * cos($lat2) * sin($dlon / 2) * sin($dlon / 2);

    $c = 2 * atan2(sqrt($a), sqrt(1 - $a));

    return $radius * $c; // Distance in kilometers
}

// Define user location
$userLat = 40.7128; // Example latitude (New York City)
$userLon = -74.0060; // Example longitude (New York City)

// Define radius in kilometers
$radius = 10; // 10 km

// List of job locations (example data)
$jobs = [
    ['id' => 1, 'title' => 'Software Engineer', 'lat' => 40.730610, 'lon' => -73.935242], // New York
    ['id' => 2, 'title' => 'Data Scientist', 'lat' => 40.748817, 'lon' => -73.985428], // Empire State Building
    ['id' => 3, 'title' => 'Product Manager', 'lat' => 40.7831, 'lon' => -73.9712], // Central Park
    ['id' => 4, 'title' => 'Marketing Specialist', 'lat' => 41.0082, 'lon' => 28.9784], // Istanbul (far away)
];

// Filter jobs within the specified radius
$filteredJobs = array_filter($jobs, function ($job) use ($userLat, $userLon, $radius) {
    $distance = haversineDistance($userLat, $userLon, $job['lat'], $job['lon']);
    return $distance <= $radius; // Include job if within radius
});

// Display filtered jobs
foreach ($filteredJobs as $job) {
    echo "Job ID: {$job['id']}, Title: {$job['title']}, Location Distance: " . round(haversineDistance($userLat, $userLon, $job['lat'], $job['lon']), 2) . " km\n";
}

Popularity 5/10 Helpfulness 1/10 Language php

Source: Grepper

Tags: calculation coordinates distance formula gps haversine php using

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Contributed on May 07 2024

Abhijith

0 Answers Avg Quality 2/10

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calculate distance between two coordinates

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static double coordinateDistance(
      double lat1, double lng1, double lat2, double lng2) {
    const p = 0.017453292519943295;
    const c = cos;
    final a = 0.5 -
        c((lat2 - lat1) * p) / 2 +
        c(lat1 * p) * c(lat2 * p) * (1 - c((lng2 - lng1) * p)) / 2;
    return 12742 * asin(sqrt(a));
  }

  // calculate distance from polyline-coordinates (list of locations)
  static double calculateDistance(
      {@required List<Location> polylineCoordinates}) {
    double _totalDistance = 0.0;

    for (int i = 0; i < polylineCoordinates.length - 1; i++) {
      _totalDistance += coordinateDistance(
        polylineCoordinates[i].lat,
        polylineCoordinates[i].lng,
        polylineCoordinates[i + 1].lat,
        polylineCoordinates[i + 1].lng,
      );
    }

Popularity 10/10 Helpfulness 2/10 Language whatever

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Tags: between

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Contributed on Mar 29 2022

Doubtful Dunlin

0 Answers Avg Quality 2/10

Distance calculation using GPS Coordinates - Haversine formula

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Distance calculation using GPS Coordinates - Haversine formula

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calculate distance between two coordinates

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