<%@ Page Language="C#" AutoEventWireup="true" CodeFile="经纬度与墨卡托互换.aspx.cs" Inherits="经纬度与墨卡托互换" %>
<!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 runat="server">
<title></title>
<script src="../js/jquery.js" type="text/javascript"></script>
<script>
//经纬度转墨卡托
function Lonlat2Mercator() {
var x = parseFloat($("#X").attr("value"));
var y = parseFloat($("#Y").attr("value"));
var tmepx = x * 20037508.342787 / 180;
var tempy = Math.log(Math.tan((90 + y) * Math.PI / 360)) / (Math.PI / 180);
tempy = tempy * 20037508.342787 / 180;
var str = "MX="+tmepx+"<br/>MY="+tempy;
$("#content").html(str);
}
//墨卡托转经纬度
function Mercator2Lonlat(){
var x = parseFloat($("#X").attr("value"));
var y = parseFloat($("#Y").attr("value"));
var tmepx = x / 20037508.34 * 180;
var tempy = y / 20037508.34 * 180;
tempy = 180 / Math.PI * (2 * Math.atan(Math.exp(tempy * Math.PI / 180)) - Math.PI / 2);
var str = "MX="+tmepx+"<br/>MY="+tempy;
$("#content").html(str);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<div style="height:30px;line-height:30px;">
x:<input id="X" type="text" />, y:<input id="Y" type="text" /> <input type="button" value="经纬度转墨卡托" οnclick="Lonlat2Mercator()" /> <input type="button" value="墨卡托转经纬度" οnclick="Mercator2Lonlat()" />
<br />
<div id="content">
</div>
</div>
</div>
</form>
</body>
</html>
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