关于地址转坐标经纬度,之间的距离的总结
/**
* 根据地址 获取经纬度
* @param $address
* @return mixed
*/
function addresstolatlag($address){
$url='http://restapi.amap.com/v3/geocode/geo?address='.$address.'&key=d5d5c6a7fcc168491804990c7f55ef08';
if($result=file_get_contents($url))
{
$result = json_decode($result,true);
//判断是否成功
if(!empty($result['count'])){
return explode(',',$result['geocodes']['0']['location']);
}else{
return false;
}
}
}
/**
* 根据经纬度 获取地址
* @param $address23.2322,12.15544
* @return mixed
*/
function getaddress($address){
$url="http://restapi.amap.com/v3/geocode/regeo?output=json&location=".$address."&key=d5d5c6a7fcc168491804990c7f55ef08";
if($result=file_get_contents($url))
{
$result = json_decode($result,true);
if(!empty($result['status'])&&$result['status']==1){
return $result['regeocode']['formatted_address'];
}else{
return false;
}
}
}
/**
* 计算某个经纬度的周围某段距离的正方形的四个点
*
* @param
* radius 地球半径 平均6371km
* @param
* lng float 经度
* @param
* lat float 纬度
* @param
* distance float 该点所在圆的半径,该圆与此正方形内切,默认值为1千米
* @return array 正方形的四个点的经纬度坐标
*/
public function returnSquarePoint($lng, $lat, $distance = 1, $radius = 6371)
{
$dlng = 2 * asin(sin($distance / (2 * $radius)) / cos(deg2rad($lat)));
$dlng = rad2deg($dlng);
$dlat = $distance / $radius;
$dlat = rad2deg($dlat);
return array(
'left-top' => array(
'lat' => $lat + $dlat,
'lng' => $lng - $dlng
),
'right-top' => array(
'lat' => $lat + $dlat,
'lng' => $lng + $dlng
),
'left-bottom' => array(
'lat' => $lat - $dlat,
'lng' => $lng - $dlng
),
'right-bottom' => array(
'lat' => $lat - $dlat,
'lng' => $lng + $dlng
)
);
}
/**
* 计算两组经纬度坐标 之间的距离
* params :lat1 纬度1; lng1 经度1; lat2 纬度2; lng2 经度2; len_type (1:m or 2:km);
* return m or km
*/
function GetDistance($lat1, $lng1, $lat2, $lng2, $len_type = 1, $decimal = 2)
{
$radLat1 = $lat1 * PI ()/ 180.0; //PI()圆周率
$radLat2 = $lat2 * PI() / 180.0;
$a = $radLat1 - $radLat2;
$b = ($lng1 * PI() / 180.0) - ($lng2 * PI() / 180.0);
$s = 2 * asin(sqrt(pow(sin($a/2),2) + cos($radLat1) * cos($radLat2) *
pow(sin($b/2),2)));
$s = $s * 6378.137;
$s = round($s * 1000);
if ($len_type --> 1)
{
$s /= 1000;
}
return round($s, $decimal);
}
/**
* 获取维修网点列表
*/
public function get_assemble_listfj($start){
$where = ' ';
$where .=' and lat > '.$start['right-bottom']['lat'];
$where .=' and lat < '.$start['left-top']['lat'];
$where .=' and lng > '.$start['left-top']['lng'];
$where .=' and lng < '.$start['right-bottom']['lng'];
$sql = ' SELECT * FROM ' . $GLOBALS['ecs']->table('assemble') . (' WHERE status = 1 '.$where);
return $GLOBALS['db']->getAll($sql);
}
使用实例:
//将地址转为坐标数组
$array = $this->addresstolatlag($consignee['region'].$consignee['address']);
//取方圆10KM坐标
$start = $this->returnSquarePoint($array[0], $array[1]);
//取方圆10KM的维修网点列表
$assemble_list = $this->get_assemble_listfj($start);
if(empty($assemble_list)){
$assemble_list = $this->get_assemble_list($consignee['province'],$consignee['city'],$consignee['district']);
}
foreach ($assemble_list as $k => $v) {
//计算距离 GetDistance($lat1, $lng1, $lat2, $lng2);
$distance = $this->GetDistance($array[1], $array[0], $v['lat'], $v['lng']);
$assemble_list[$k]['distance'] = $distance;
}
转载自:https://blog.csdn.net/u011125949/article/details/86364101