通过经纬度确定一定范围内哪些门店离客户最近,如1000米内有哪些最近的某某门店

最近公司需要通过客户的收货地址查询离客户地址最近有哪些门店,客户可以去最近的门店取货.

那我们是如何计算出客户地址1000米内有哪些门店呢?我们可以通过下面几部计算出来.

1.获取客户地址的经纬度,我们可以通过百度地图提供的接口获取.($address为客户地址)

//百度接口获取经纬度
public function getlat($address) {
$url = 'http://api.map.baidu.com/geocoder/v2/?city=上海&address=' . $address . '&output=json&ak=' . $this->ak;

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_NOSIGNAL, 1);
$data = curl_exec($ch);
curl_close($ch);
$data = json_decode($data, true);
$ret['lat'] = $data['result']['location']['lat'];
$ret['lng'] = $data['result']['location']['lng'];
echo json_encode($ret);
}

2.如果是1000米内的店,我们需要计算出1000米内的经纬度范围.

/*
* 计算经纬度范围
* $lat 纬度
* $lon 经度
* $raidus 半径(米)
*/

function getAround($lat, $lon, $raidus) {
$PI = 3.14159265;
$EARTH_RADIUS = 6378137;
$RAD = $PI / 180.0;

$latitude = $lat;
$longitude = $lon;
$degree = (24901 * 1609) / 360.0;
$raidusMile = $raidus;
$dpmLat = 1 / $degree;
$data = array();
$radiusLat = $dpmLat * $raidusMile;
$minLat = $latitude - $radiusLat;
$maxLat = $latitude + $radiusLat;
$data["maxLat"] = $maxLat;
$data["minLat"] = $minLat;
$mpdLng = $degree * cos($latitude * ($PI / 180));
$dpmLng = 1 / $mpdLng;
$radiusLng = $dpmLng * $raidusMile;
$minLng = $longitude - $radiusLng;
$maxLng = $longitude + $radiusLng;
$data["maxLng"] = $maxLng;
$data["minLng"] = $minLng;
//print_r($data);
return $data;
}

3.我们知道数据库内每一家店都储存了这家店的经纬度信息,现在我们可以通过上面计算出的经纬度范围来查询出1000米内有哪些门店了.

//计算出半径范围内的店
public function getdz($lat, $lng) {
include_once('my_db.php');
$this->qu = new MY_DB_ALL("QUICK");
//$ret = json_decode($this->getlat($address), true);
//print_r($ret);exit;
$data = $this->getAround($lat, $lng, 2000);
//print_r($data);
$sql = "select * from shop where baidu_lat between '" . $data['minLat'] . "' and '" . $data['maxLat'] . "' and baidu_lng between '" . $data['minLng'] . "' and '" . $data['maxLng'] . "' and status=1 and ztd_flag=2";
$rett = $this->qu->rquery($sql);
for ($i=0;$i<count($rett);$i++) {
$array[$i]["shop_id"] = $rett[$i]["shop_id"];
$array[$i]["shop_name"] = iconv("gbk","utf-8",$rett[$i]["shop_name"]);
$array[$i]["shop_address"] = iconv("gbk","utf-8",$rett[$i]["shop_address"]);
$array[$i]["shop_date"] = $rett[$i]["shop_date"];
$array[$i]['shop_phone'] = $rett[$i]["shop_phone"];
$array[$i]['area'] = $rett[$i]["area"];
}
//echo "<pre>";print_r($array);exit;
echo json_encode($array);
}

上面的代码需要根据自己实际情况来编写哦.大家主要看$sql这个sql语句就行了.嘿嘿

4.如果想计算出离客户址最近的一家店是哪家,我需要一个计算距离的方法,如下:

/**
*  @desc 根据两点间的经纬度计算距离
*  @param float $lat 纬度值
*  @param float $lng 经度值
*/
public function getDistance($lat1, $lng1, $lat2, $lng2) {
$earthRadius = 6367000; //地球半径

$lat1 = ($lat1 * pi() ) / 180;
$lng1 = ($lng1 * pi() ) / 180;

$lat2 = ($lat2 * pi() ) / 180;
$lng2 = ($lng2 * pi() ) / 180;

$calcLongitude = $lng2 - $lng1;
$calcLatitude = $lat2 - $lat1;
$stepOne = pow(sin($calcLatitude / 2), 2) + cos($lat1) * cos($lat2) * pow(sin($calcLongitude / 2), 2);
$stepTwo = 2 * asin(min(1, sqrt($stepOne)));
$calculatedDistance = $earthRadius * $stepTwo;

return round($calculatedDistance);
}

5.最后我们通过计算比较1000米内那几家店最少距离就可以知道最近是哪个店了.

//计算出最近的一家店
public function zjd($address) {
$ret = $this->getdz($address);
$jwd = $this->getlat($address);
if ($ret) {
$arr = array();
foreach ($ret as $k => $v) {
$arr[$k] = $this->getDistance($jwd['lat'], $jwd['lng'], $v['baidu_lat'], $v['baidu_lng']);
}
asort($arr);
//print_r($arr);
foreach ($arr as $k1 => $v1) {
$data[] = $ret[$k1];
}
print_r($data);
} else {
echo '无最近的门店';
}
}