Community Learn Tools Library Leisure
search
English
Home > Backend Development > PHP Tutorial > Calculate the distance between two points on the map

Calculate the distance between two points on the map

WBOY
Release： 2016-07-25 08:50:39
Original
1135 people have browsed it
  2. class GeoHelper
  3. {
  4. /**
  5. * @param int $lat1
  6. * @param int $lon1
  7. * @param int $lat2
  8. * @param int $lon2
  9. * @param string $unit
  10. * @return
  11. */
  12. public static function distance($lat1, $lon1, $lat2, $lon2, $unit = "K")
  13. {
  14. $theta = $lon1 - $lon2;
  15. $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) + cos(deg2rad($lat1)) * cos(deg2rad
  16. ($lat2)) * cos(deg2rad($theta));
  17. $dist = acos($dist);
  18. $dist = rad2deg($dist);
  19. $miles = $dist * 60 * 1.1515;
  20. $unit = strtoupper($unit);
  22. if ($unit == "K") {
  23. return ($miles * 1.609344);
  24. } else
  25. if ($unit == "N") {
  26. return ($miles * 0.8684);
  27. } else { //mi
  28. return $miles;
  29. }
  30. }
  32. /**
  33. *
  34. * @param string $address
  35. * @param string $apikey
  36. * @return array [1]:lat [0]:lng
  37. */
  38. public static function getLatLng($address, $apikey)
  39. {
  40. $find = array("n", "r", " ");
  41. $replace = array("", "", "+");
  42. $address = str_replace($find, $replace, $address);
  43. $url = 'http://maps.google.com/maps/geo?q=' . $address . '&key=' . $apikey .
  44. '&sensor=false&output=xml&oe=utf8';
  45. $response = self::xml2array($url);
  46. $coordinates = $response['kml']['Response']['Placemark']['Point']['coordinates'];
  47. if (!empty($coordinates)) {
  48. $point_array = split(",", $coordinates);
  49. return $point_array;
  50. }
  51. }
  52. }
复制代码


Related labels：
计算地图上两点间的距离
source：php.cn
Previous article：Calendar form Next article：6 Efficient PHP Frameworks for Creating Web Applications
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Latest Issues
Using date-fns with Firestore server timestamps I'm trying to format my Firestore server timestamp in ReactNative using https://date-fns.o...
From 2024-03-30 17:37:10
0
1
375
Related Topics
More>
Popular Recommendations
Popular Tutorials
More>
Related Tutorials
Popular Recommendations
Latest courses
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template