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map.php
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map.php
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<!DOCTYPE HTML>
<html>
<head>
<title>加载海量点</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<meta name="viewport"
content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no">
<style type="text/css">
html, body {
margin: 0;
width: 100%;
height: 100%;
background: #ffffff;
}
#map {
width: 100%;
height: 100%;
}
#panel {
position: absolute;
top: 30px;
left: 10px;
z-index: 999;
color: #fff;
}
#login {
position: absolute;
width: 300px;
height: 40px;
left: 50%;
top: 50%;
margin: -40px 0 0 -150px;
}
#login input[type=password] {
width: 200px;
height: 30px;
padding: 3px;
line-height: 30px;
border: 1px solid #000;
}
#login input[type=submit] {
width: 80px;
height: 38px;
display: inline-block;
line-height: 38px;
}
</style>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=ABMyPFHzCuKItIEoAG2FZjtt"></script>
<script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/data/points-sample-data.js"></script>
</head>
<body>
<div id="map"></div>
<script type="text/javascript">
var map = new BMap.Map("map", {}); // 创建Map实例
map.centerAndZoom(new BMap.Point(105.000, 38.000), 5); // 初始化地图,设置中心点坐标和地图级别
map.enableScrollWheelZoom(); //启用滚轮放大缩小
if (document.createElement('canvas').getContext) { // 判断当前浏览器是否支持绘制海量点
var points = []; // 添加海量点数据
<?php
$myfile = fopen("little.txt", "r") or die("Unable to open file!");
$data=array();
while(!feof($myfile)) {
$str=fgets($myfile);
$arr=explode(',',$str);
$arr[1]=substr($arr[1],0,-2);
if($arr[1]){
array_push($data,$arr);
}
}
fclose($myfile);
echo 'data='.json_encode($data).';';
?>
for (var i = 0; i < data.length; i++) {
var convertor = new BMap.Convertor();
var ggPoint = new BMap.Point(data[i][0], data[i][1]);
var pointArr = [];
pointArr.push(ggPoint);
convertor.translate(pointArr, 1, 5, translateCallback);
}
var options = {
size: BMAP_POINT_SIZE_SMALL,
shape: BMAP_POINT_SHAPE_STAR,
color: '#d340c3'
}
var pointCollection = new BMap.PointCollection(points, options); // 初始化PointCollection
pointCollection.addEventListener('click', function (e) {
alert('单击点的坐标为：' + e.point.lng + ',' + e.point.lat); // 监听点击事件
});
map.addOverlay(pointCollection); // 添加Overlay
//坐标转换完之后的回调函数
translateCallback = function (data1){
if(data1.status === 0) {
points.push(new BMap.Point(data1.points[0]));
}
}
} else {
alert('请在chrome、safari、IE8+以上浏览器查看本示例');
}
</script>
</body>
</html>