百度API接口把GPS坐标转换为百度坐标

网址

http://developer.baidu.com/map/jsdemo/demo/convertor.js     这是单个坐标转换接口

http://developer.baidu.com/map/jsdemo/demo/changeMore.js   这是批量转换接口

我把他们的源代码贴出来

批量转换函数

//2011-7-25 zhangying(function(){function load_script(xyUrl, callback){    var head = document.getElementsByTagName('head')[0];    var script = document.createElement('script');    script.type = 'text/javascript';    script.src = xyUrl;    //借鉴了jQuery的script跨域方法    script.onload = script.onreadystatechange = function(){        if((!this.readyState || this.readyState === "loaded" || this.readyState === "complete")){            callback && callback();            // Handle memory leak in IE            script.onload = script.onreadystatechange = null;            if ( head && script.parentNode ) {                head.removeChild( script );            }        }    };    // Use insertBefore instead of appendChild  to circumvent an IE6 bug.    head.insertBefore( script, head.firstChild );}function transMore(points,type,callback){var xyUrl = "http://api.map.baidu.com/ag/coord/convert?from=" + type + "&to=4&mode=1";var xs = [];var ys = [];var maxCnt = 20;//每次发送的最大个数var send = function(){var url = xyUrl + "&x=" + xs.join(",") + "&y=" + ys.join(",") + "&callback=callback";    //动态创建script标签    load_script(url);xs = [];ys = [];}    for(var index in points){if(index % maxCnt == 0 && index != 0){send();}    xs.push(points[index].lng);    ys.push(points[index].lat);if(index == points.length - 1){send();}    }    }window.BMap = window.BMap || {};BMap.Convertor = {};BMap.Convertor.transMore = transMore;})();

单个转换函数

//2011-7-25(function(){        //闭包function load_script(xyUrl, callback){    var head = document.getElementsByTagName('head')[0];    var script = document.createElement('script');    script.type = 'text/javascript';    script.src = xyUrl;    //借鉴了jQuery的script跨域方法    script.onload = script.onreadystatechange = function(){        if((!this.readyState || this.readyState === "loaded" || this.readyState === "complete")){            callback && callback();            // Handle memory leak in IE            script.onload = script.onreadystatechange = null;            if ( head && script.parentNode ) {                head.removeChild( script );            }        }    };    // Use insertBefore instead of appendChild  to circumvent an IE6 bug.    head.insertBefore( script, head.firstChild );}function translate(point,type,callback){    var callbackName = 'cbk_' + Math.round(Math.random() * 10000);    //随机函数名    var xyUrl = "http://api.map.baidu.com/ag/coord/convert?from="+ type + "&to=4&x=" + point.lng + "&y=" + point.lat + "&callback=BMap.Convertor." + callbackName;    //动态创建script标签    load_script(xyUrl);    BMap.Convertor[callbackName] = function(xyResult){        delete BMap.Convertor[callbackName];    //调用完需要删除改函数        var point = new BMap.Point(xyResult.x, xyResult.y);        callback && callback(point);    }}window.BMap = window.BMap || {};BMap.Convertor = {};BMap.Convertor.translate = translate;})();

今天在网页中有一个函数想转换单个的，有一个函数想批量转换，把这两个都引用进项目后，出现了错误，后面分析源代码之后，找出了原因，在于最后三个语句，他们都是相同的，后面一个加入的覆盖了前面一个，所以造成总有一个接口使用不了

因此，我把这两个接口合二为一，把源代码引用到自己的项目中，解决了问题

二合一之后的源代码

(function(){        //闭包function load_script(xyUrl, callback){    var head = document.getElementsByTagName('head')[0];    var script = document.createElement('script');    script.type = 'text/javascript';    script.src = xyUrl;    //借鉴了jQuery的script跨域方法    script.onload = script.onreadystatechange = function(){        if((!this.readyState || this.readyState === "loaded" || this.readyState === "complete")){            callback && callback();            // Handle memory leak in IE            script.onload = script.onreadystatechange = null;            if ( head && script.parentNode ) {                head.removeChild( script );            }        }    };    // Use insertBefore instead of appendChild  to circumvent an IE6 bug.    head.insertBefore( script, head.firstChild );}function translate(point,type,callback){//单个转换    var callbackName = 'cbk_' + Math.round(Math.random() * 10000);    //随机函数名    var xyUrl = "http://api.map.baidu.com/ag/coord/convert?from="+ type + "&to=4&x=" + point.lng + "&y=" + point.lat + "&callback=BMap.Convertor." + callbackName;    //动态创建script标签    load_script(xyUrl);    BMap.Convertor[callbackName] = function(xyResult){        delete BMap.Convertor[callbackName];    //调用完需要删除改函数        var point = new BMap.Point(xyResult.x, xyResult.y);        callback && callback(point);    };}function transMore(points,type,callback){//批量转换var xyUrl = "http://api.map.baidu.com/ag/coord/convert?from=" + type + "&to=4&mode=1";var xs = [];var ys = [];var maxCnt = 30;//每次发送的最大个数var send = function(){var url = xyUrl + "&x=" + xs.join(",") + "&y=" + ys.join(",") + "&callback=callback";    //动态创建script标签    load_script(url);xs = [];ys = [];};    for(var index in points){if(index % maxCnt == 0 && index != 0){send();}    xs.push(points[index].lng);    ys.push(points[index].lat);if(index == points.length - 1){send();}    }    }window.BMap = window.BMap || {};BMap.Convertor = {};BMap.Convertor.translate = translate;BMap.Convertor.transMore = transMore;})();

另外附上两个接口使用的示例源代码

单个转换的接口

<!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;}</style><script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=您的密钥"></script><script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script><title>GPS转百度</title></head><body><div id="allmap"></div></body></html><script type="text/javascript">// 百度地图API功能//GPS坐标var xx = 116.397428;var yy = 39.90923;var gpsPoint = new BMap.Point(xx,yy);//地图初始化var bm = new BMap.Map("allmap");bm.centerAndZoom(gpsPoint, 15);bm.addControl(new BMap.NavigationControl());//添加谷歌marker和labelvar markergps = new BMap.Marker(gpsPoint);bm.addOverlay(markergps); //添加GPS标注var labelgps = new BMap.Label("我是GPS标注哦",{offset:new BMap.Size(20,-10)});markergps.setLabel(labelgps); //添加GPS标注//坐标转换完之后的回调函数translateCallback = function (point){    var marker = new BMap.Marker(point);    bm.addOverlay(marker);    var label = new BMap.Label("我是百度标注哦",{offset:new BMap.Size(20,-10)});    marker.setLabel(label); //添加百度label    bm.setCenter(point);    alert(point.lng + "," + point.lat);}setTimeout(function(){    BMap.Convertor.translate(gpsPoint,0,translateCallback);     //真实经纬度转成百度坐标}, 2000);</script>

批量转换的示例接口

<!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;}</style><script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=您的密钥"></script><script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/changeMore.js"></script><title>批量坐标转换</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");map.centerAndZoom(new BMap.Point(116.404, 39.915), 15);var i;var markers = [];map.addEventListener("click",function(e){    alert(e.point.lng + "," + e.point.lat);});//注意：百度和谷歌的经纬度坐标顺序是相反的。var points = [new BMap.Point(116.3786889372559,39.90762965106183),              new BMap.Point(116.38632786853032,39.90795884517671),              new BMap.Point(116.39534009082035,39.907432133833574),              new BMap.Point(116.40624058825688,39.90789300648029),              new BMap.Point(116.41413701159672,39.90795884517671)             ];function callback(xyResults){ var xyResult = null; for(var index in xyResults){  xyResult = xyResults[index];  if(xyResult.error != 0){continue;}//出错就直接返回;  var point = new BMap.Point(xyResult.x, xyResult.y);     var marker = new BMap.Marker(point);     map.addOverlay(marker);     map.setCenter(point);// 由于写了这句，每一个被设置的点都是中心点的过程    }}setTimeout(function(){    BMap.Convertor.transMore(points,2,callback);        //一秒之后开始进行坐标转换。参数2，表示是从GCJ-02坐标到百度坐标。参数0，表示是从GPS到百度坐标}, 1000);</script>