sumile 0 评论 MySql 1 阅读

计算某经纬度离某经纬度之间的距离

数据库查询语句： 
SELECT
id,
NAME,
province_id,
city_id,
area_id,
address,
SERVER,
average,
lng,
lat,round((2 * SIN(SQRT(POW(SIN((lat1* pi() / 180.0-lat2* pi() / 180.0)/2),2) +COS(lat1* pi() / 180.0)*COS(lat2* pi() / 180.0)*POW(SIN((lng1 * pi() / 180.0-lng2 * pi() / 180.0)/2),2))))*6378.137* 10000)/10000 AS dist
FROM
`ser_shop`
WHERE
service_type LIKE "%|1|%"
HAVING
dist < 2000
ORDER BY
dist ASC
主要是这句，用来查询到距离： 
round((2 * SIN(SQRT(POW(SIN((lat1* pi() / 180.0-lat2* pi() / 180.0)/2),2) +COS(lat1* pi() / 180.0)*COS(lat2* pi() / 180.0)*POW(SIN((lng1 * pi() / 180.0-lng2 * pi() / 180.0)/2),2))))*6378.137* 10000)/10000 AS dist
lat1 lng1是一个经纬度 lat2 lng2是另一个经纬度   代码是从这里提取出来的： http://www.storyday.com/wp-content/uploads/2008/09/latlung_dis.html 它里面的js的主要代码是这样的： 
var radLat1 = rad(lat1);
var radLat2 = rad(lat2);
var a = radLat1 - radLat2;
var  b = rad(lng1) - rad(lng2);
var s = 2 * SIN(SQRT(POW(SIN(a/2),2) +COS(radLat1)*COS(radLat2)*POW(SIN(b/2),2)));
s = s *6378.137 ;// EARTH_RADIUS;
s = Math.round(s * 10000) / 10000;



function rad(d)
{
return d * Math.PI / 180.0;
}
全部的html页面代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head profile="http://gmpg.org/xfn/11">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>经纬度距离计算小工具</title>
<style>
body {margin:5px 0;padding:0;
font-size:12px;TEXT-ALIGN: center;
font-family: arial, helvetica, sans-serif;TEXT-ALIGN: center;background:#FFF;
}
HTML BODY { TEXT-ALIGN: center;}
div{MARGIN: 0px auto; font-family: arial, helvetica, sans-serif;text-align:left;
}
#page ,div.page{width:980px;overflow:visible;text-align:center;}
#main{float:left;width:73%;text-align:left;overflow:hidden;}
#sidebar{float:right;width:26%;}
#main p{ line-height: 25px ;font-size:14px;
}
a img{border:0;}
p a img{
border:1px solid #eee;padding:2px;margin:3px;
}
i.corner{display: block;}
i.corner i{height:1px; display:block; font-size:1px; overflow:hidden; background-color:#FFFFFF;}
i.corner i.l1{
margin: 0 5px;
border-bottom:1px solid #ced4ca;
}
i.corner i.l2,i.corner i.l3,i.corner i.l4,div.cbody{
margin: 0 3px;
border-left:1px solid #ced4ca;
border-right:1px solid #ced4ca;background:#fff;
}
i.corner i.l3{margin: 0 2px;}
i.corner i.l4{margin: 0 1px;height: 1px;}
i.corner i.l5{margin: 0 5px;border-top:1px solid #ced4ca;height:1px;}
div.cbody{
padding: 0 8px;
margin:0;background:#fff;text-align:left;
}
.panel{width:100%;font-size:12px;margin:5px 0 ;}
div.cbody .detailentry,div.cbody h1{margin:0;padding:0;}
.cbody ul{
list-style:none;
}
#CodeLable, #revq, td{
font-weight:bold;font-size:18px;
}
td{
font-weight:normal;
}
td.lb{
text-align:right;padding:0 5px 0 0;color:green;width:150px;
}
.warning{background:red;color:#fff;padding:2px;float:left;}
/* end of corner*/</style>
<body> <div id="page">
<div class="page">
<h2>度分秒 TO 小数点 转换</h2>
<div class="panel">
<i class="corner"><i class="l1"></i><i class="l2"></i><i class="l3"></i><i class="l4"></i></i>
<div class="cbody">
<div style="text-align:center;height:60px;">
<div style="float:left;color:green;font-weight:bold;font-size:14px;width:50px;" id="sign1">&nbsp;</div>
<div style="float:left;">
<input type="text" id="deg" name="deg" onKeyUp="Convert2Dec()" />度
<input type="text" id="min" name="min" onKeyUp="Convert2Dec()"/>分
<input type="text" id="sec" name="sec" onKeyUp="Convert2Dec()"/>秒<br /><br />
=
<input type="text" id="deg2" name="deg2" onkeyup="Convert2Deg()" />度
</div>
<div style="float:left;color:green;font-weight:bold;font-size:14px;width:50px;" id="sign2">&nbsp;</div>
</div>
</div>
<i class="corner"><i class="l4"></i><i class="l3"></i><i class="l2"></i><i class="l5"></i></i>
</div>
<h2>经纬度距离计算</h2>
<div class="panel">
<i class="corner"><i class="l1"></i><i class="l2"></i><i class="l3"></i><i class="l4"></i></i>
<div class="cbody">
<div style="text-align:center;height:100px;">
<div style="text-align:left;float:left;margin-left:40px;">
A：纬度<input type="text" name="lat1" id="lat1" onKeyUp="calDis()" /> 经度<input type="text" name="lng1" id="lng1" onKeyUp="calDis()" /><br /><br />
B：纬度<input type="text" name="lat2" id="lat2" onKeyUp="calDis()" />经度<input type="text" name="lng2" id="lng2" onKeyUp="calDis()" /><br /><br />
A-B：距离=<input type="text" name="distance" id="distance" /> Km
</div>
<div class="warning" id="warning"></div>
</div>
</div>
<i class="corner"><i class="l4"></i><i class="l3"></i><i class="l2"></i><i class="l5"></i></i>
</div>
<SCRIPT LANGUAGE="JavaScript">
<!--
function getVal(obj){
if( document.getElementById( obj ) != null )
return document.getElementById( obj ).value;
else return 0;
}
function setVal(obj,val){
if( document.getElementById( obj ) != null )
document.getElementById( obj ).value = val;
}
function Convert2Dec(){
var deg = Math.abs( getVal('deg') );
var min = Math.abs( getVal('min') );
var sec = Math.abs( getVal('sec') );
var deci =deg * 1 + ( sec * 1 + min * 60 )/3600 ;
setVal("deg2",deci);
}
function Convert2Deg(){
var deci = Math.abs( getVal('deg2') );
var deci2 = deci + '';
if( deci2.indexOf('.') == -1 ){
setVal("deg",deci);
return false;
}
deci = deci2.split(".");
setVal("deg",deci[0] );
//
deci[1] = "0."+ deci[1];
var min_sec = deci[1] * 3600;
var min = Math.floor( min_sec / 60 );
var sec = ( min_sec - ( min * 60 ) ) ;
setVal("min",min);
setVal("sec",sec);
}
function hide(m){
document.getElementById(m).style.display="none";
return true;
}
function show(m){
document.getElementById(m).style.display= "";
return true;
}
//private const double EARTH_RADIUS = 6378.137;
function rad(d)
{
return d * Math.PI / 180.0;
}
function GetDistance( lat1, lng1, lat2, lng2)
{hide("warning");
if( ( Math.abs( lat1 ) > 90 ) ||( Math.abs( lat2 ) > 90 ) ){
document.getElementById("warning").innerHTML = ("兄台，这哪里是纬度啊？分明是想忽悠我嘛");
show("warning");
return "耍我？拒绝计算！";
}else{
hide("warning");
}
if( ( Math.abs( lng1 ) > 180 ) ||( Math.abs( lng2 ) > 180 ) ){
show("warning");
document.getElementById("warning").innerHTML = ("兄台，这哪里是经度啊？分明是想忽悠我嘛");
return "耍我？拒绝计算！";
}else{
hide("warning");
}
var radLat1 = rad(lat1);
var radLat2 = rad(lat2);
var a = radLat1 - radLat2;
var b = rad(lng1) - rad(lng2);
var s = 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a/2),2) +
Math.cos(radLat1)*Math.cos(radLat2)*Math.pow(Math.sin(b/2),2)));
s = s *6378.137 ;// EARTH_RADIUS;
s = Math.round(s * 10000) / 10000;
return s;
}
function calDis(){
var lat1 = document.getElementById( "lat1").value * 1;
var lat2 = document.getElementById( "lat2").value * 1;
var lng1 = document.getElementById( "lng1").value * 1;
var lng2 = document.getElementById( "lng2").value * 1;
var dis = GetDistance(lat1, lng1, lat2, lng2);
document.getElementById( "distance").value = dis;
}
//-->
</SCRIPT>
<div style="text-align:Center"> This Tool is Powered by Cosbeta [china.cos(at)gmail.com]</div>
</div> </div>
</body>
<!-- 广州京信数字微波 江东 2008年 -->
</html>
文章标签
#距离#地球#mysql
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