利用百度地图的服务将经纬度转换为米单位坐标
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;
using System.Diagnostics;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
double[,] LonLat = new double[2, 2] { { 114.21892734521, 29.575429778924 }, { 114.21892734521, 29.575429778924 } };
string url = string.Format("http://api.map.baidu.com/geoconv/v1/?coords={0},{1};{2},{3}&from=1&to=6&ak=你的密钥", LonLat[0,0], LonLat[0,1], LonLat[1,0], LonLat[1,1]);
string res = SendRequest(url, Encoding.UTF8);
Debug.WriteLine(res);
int x = res.IndexOf("\"x\":");
int y = res.IndexOf("\"y\":");
int endy = res.IndexOf("}");
string xx = res.Substring(x+ 4, y - x - 5);
string yy = res.Substring(y + 4, endy - y-4);
Console.Write(xx+"米 ");
Console.WriteLine(yy + "米 ");
x = res.IndexOf("\"x\":", x+3);
y = res.IndexOf("\"y\":",y+3);
endy = res.IndexOf("}",endy+3);
xx = res.Substring(x + 4, y - x - 5);
yy = res.Substring(y + 4, endy - y - 4);
Console.Write(xx+"米 ");
Console.WriteLine(yy + "米");
}
/// <summary>
/// Get方式获取url地址输出内容
/// </summary> /// <param name="url">url</param>
/// <param name="encoding">返回内容编码方式，例如：Encoding.UTF8</param>
public static String SendRequest(String url, Encoding encoding)
{
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(url);
webRequest.Method = "GET";
HttpWebResponse webResponse = (HttpWebResponse)webRequest.GetResponse();
StreamReader sr = new StreamReader(webResponse.GetResponseStream(), encoding);
return sr.ReadToEnd();
}
}
}
结果：
官方开发说明：http://developer.baidu.com/map/changeposition.htm
获取密钥：http://lbsyun.baidu.com/apiconsole/key
我自己的密钥：http://lbsyun.baidu.com/apiconsole/key
http://developer.baidu.com/map/jsdemo.htm#a1_2
利用密钥还建立了一个显示地图的网页
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
body, html,#allmap {width: 100%;height: 100%;overflow: hidden;margin:0;font-family:"微软雅黑";}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=密钥"></script>
<title>地图展示</title>
</head>
<body>
<div id="allmap"></div>
</body>
</html>
<script type="text/javascript">
// 百度地图API功能
var map = new BMap.Map("allmap"); // 创建Map实例
map.centerAndZoom(new BMap.Point(116.404, 39.915), 11); // 初始化地图,设置中心点坐标和地图级别
map.addControl(new BMap.MapTypeControl()); //添加地图类型控件
map.setCurrentCity("北京"); // 设置地图显示的城市 此项是必须设置的
map.enableScrollWheelZoom(true); //开启鼠标滚轮缩放
</script>
一个有关地图的开源项目：
http://greatmaps.codeplex.com/SourceControl/latest
时间： 2024-10-05 08:04:17