js版 计算经纬度距离 及 某点是否在经纬度节点范围

本文档由 https://blog.csdn.net/AdminGuan/article/details/128118657 改版而来。

php 版 计算经纬度距离 及 某点是否在经纬度节点范围

public function index(){//1.计算两个点(经纬度)的距离$staVal = ['lng' => '106.64647211048887', 'lat' => '26.619020177917346'];$endVal = ['lng' => '106.65148784134672', 'lat' => '26.615442440608998'];print_r($this->calcCoordsDistance($staVal, $endVal));//2.判断某一点是否在某一区域范围内(lng.经度 lat.纬度)$point1 = [121.65628910064697, 31.14649210398973]; //地点示例 1$point2 = [106.64647211048887, 26.619020177917346]; //地点示例 2$areaList = [[121.64199829101561, 31.128897282106205],[121.6805362701416, 31.128897282106205],[121.685362701416, 31.157914133949994],[121.64199829101561, 31.157914133949994],[121.64199829101561, 31.128897282106205],];var_dump('point1=' . $this->judgeCoordsInArea($point1, $areaList)); // truevar_dump('point2=' . $this->judgeCoordsInArea($point2, $areaList)); // falsereturn 'test/index';}/*** 计算两个点(经纬度)的距离* @param array $startDot 开始点的经纬度(lng.经度 lat.纬度)* @param array $endDot 结束点的经纬度(lng.经度 lat.纬度)* @return ['mVal' => string, 'kmVal' => string, 'originVal' => '两点的经纬度为必传'] originVal.原始值单位为米*/protected function calcCoordsDistance(array $startDot, array $endDot) {$result = ['mVal' => '', 'kmVal' => '', 'originVal' => '两点的经纬度为必传'];if (empty($startDot) || empty($endDot)) {return $result;}$earthRadius = 6378137.0; // 地球半径$startRadianLat = $this->getRadian($startDot['lat']); // 纬度 - 开始$endRadianLat = $this->getRadian($endDot['lat']); // 纬度 - 结束//差值$latDiffVal = $startRadianLat - $endRadianLat; // 维度差值$lngDiffVal = $this->getRadian($startDot['lng']) - $this->getRadian($endDot['lng']); // 经度差值//差值的正弦值$latDiffSinVal = sin($latDiffVal / 2); // 维度差值的正弦值$lngDiffSinVal = sin($lngDiffVal / 2); // 经度差值的正弦值//余弦值乘积$latCosProduct = cos($startRadianLat) * cos($endRadianLat); // 维度的余弦值乘积$powVal = $latCosProduct * pow($lngDiffSinVal, 2);$sqrtVal = pow($latDiffSinVal, 2) + $powVal; // 开平方根的值// 结果值$res = 2 * asin(sqrt($sqrtVal)) * $earthRadius;$result['mVal'] = sprintf("%.2f", $res) . "m"; // 单位米$result['kmVal'] = sprintf("%.5f", ($res / 1000)) . "km"; // 单位千米$result['originVal'] = $res;return $result;}protected function getRadian($d) {return ($d * pi()) / 180.0; // 圆周率π}/** 判断某一点是否在某一区域范围内(lng.经度 lat.纬度)* @param array $dot 需要判断的点(格式：[lng: "", lat: ""])* @param array $range 区域范围(格式：[[lng: "", lat: ""], [lng: "", lat: ""]])* @returns {boolean} true.存在 false.不存在*/protected function judgeCoordsInArea(array $dot, array $range) {$count = 0;$r1 = $range[0];for ($i = 1; $i < count($range); $i++) {$r2 = $range[$i % count($range)];$t1 = $dot[0] > min($r1[0], $r2[0]) && $dot[0] <= max($r1[0], $r2[0]);$t2 = $dot[1] <= max($r1[1], $r2[1]) && $r1[0] !== $r2[0];if ($t1 && $t2) {$term = (($dot[0] - $r1[0]) * ($r2[1] - $r1[1])) / ($r2[0] - $r1[0]) + $r1[1];if ($r1[1] === $r2[1] || $dot[1] <= $term) $count++;}$r1 = $r2;}return $count % 2 !== 0;}