Javascript Google map api v3从数组添加多段线
我试图从一个数组向谷歌地图添加一组多边形线 这是我的密码:Javascript Google map api v3从数组添加多段线,javascript,google-maps-api-3,Javascript,Google Maps Api 3,我试图从一个数组向谷歌地图添加一组多边形线 这是我的密码: <!DOCTYPE html> <html> <head> <meta name="viewport" content="initial-scale=1.0, user-scalable=no" /> <style type="text/css"> html { height: 90% } body { height: 90%; margin: 0; paddin
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 90% }
body { height: 90%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.googleapis.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
var poly;
var map;
function initialize() {
var latlng = new google.maps.LatLng(38.698044, -77.210411);
var myOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
//var myLatLng = new google.maps.LatLng(0, -180);
}
var polyOptions = {
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 3
}
poly = new google.maps.Polyline(polyOptions);
poly.setMap(map);
var path = new MVCArray;
$.getJSON('json.php', function(data) {
//var items = [];
$.each(data, function(key, val) {
path.push(new google.maps.LatLng(val.lat, val.longi));
});
});
var myOptions = {
zoom: 12,
//center: myLatLng,
mapTypeId: google.maps.MapTypeId.TERRAIN
};
</script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.0/jquery.min.js"></script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:90%; height:100%"></div>
</body>
</html>
<html>
<head>
</head>
<body>
</body>
</html>
html{高度:90%}
正文{高度:90%;边距:0;填充:0}
#地图画布{高度:100%}
var-poly;
var映射;
函数初始化(){
var latlng=新的google.maps.latlng(38.698044,-77.210411);
变量myOptions={
缩放:8,
中心:拉特林,
mapTypeId:google.maps.mapTypeId.ROADMAP
};
var map=new google.maps.map(document.getElementById(“map_canvas”),myOptions);
//var mylatng=new google.maps.LatLng(0,-180);
}
var多选项={
strokeColor:“#000000”,
笔划不透明度:1.0,
冲程重量:3
}
poly=新的google.maps.Polyline(多选项);
poly.setMap(map);
var路径=新的MVCArray;
$.getJSON('json.php',函数(数据){
//var项目=[];
$。每个(数据、函数(键、值){
push(新的google.maps.LatLng(val.lat,val.longi));
});
});
变量myOptions={
缩放:12,
//中心:myLatLng,
mapTypeId:google.maps.mapTypeId.TERRAIN
};
关于为什么要使用line path.push(新的google.maps.LatLng(val.lat,val.longi))的想法;没有在中添加数据吗
或者有更好的方法让我循环数据吗?因此您可以循环
数据的内容,将内容添加到数组中,路径
。。。。然后呢,什么?据我所知什么都没有。然后,您可能希望使用该路径数组设置多段线的路径
var polyOptions = {
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 3
}
poly = new google.maps.Polyline(polyOptions);
poly.setMap(map);
var path = new MVCArray;
$.getJSON('json.php', function(data) {
//var items = [];
$.each(data, function(key, val) {
path.push(new google.maps.LatLng(val.lat, val.longi));
});
// now update your polyline to use this path
poly.setPath(path);
});
PS:您的HTML结构完全错误:
<body onload="initialize()">
<div id="map_canvas" style="width:90%; height:100%"></div>
</body>
</html>
<html>
<head>
</head>
<body>
</body>
</html>
难道这不应该吗
<body onload="initialize()">
<div id="map_canvas" style="width:90%; height:100%"></div>
</body>
</html>
您应该将所有代码放在初始化函数中:
<script type="text/javascript">
var poly;
var map;
function initialize() {
var latlng = new google.maps.LatLng(38.698044, -77.210411);
var myOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
//map is already declared
//var map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
map = new google.maps.Map(document.getElementById("map_canvas"),myOptions);
var polyOptions = {
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 3
}
poly = new google.maps.Polyline(polyOptions);
poly.setMap(map);
var path = new MVCArray;
// every time the path is updated, automatically the map will update the polyline
poly.setPath(path);
$.getJSON('json.php', function(data) {
//var items = [];
$.each(data, function(key, val) {
path.push(new google.maps.LatLng(val.lat, val.longi));
});
});
var myOptions = {
zoom: 12,
//center: myLatLng,
mapTypeId: google.maps.MapTypeId.TERRAIN
};
}
</script>
var-poly;
var映射;
函数初始化(){
var latlng=新的google.maps.latlng(38.698044,-77.210411);
变量myOptions={
缩放:8,
中心:拉特林,
mapTypeId:google.maps.mapTypeId.ROADMAP
};
//地图已声明
//var map=new google.maps.map(document.getElementById(“map_canvas”),myOptions);
map=new google.maps.map(document.getElementById(“map_canvas”),myOptions);
var多选项={
strokeColor:“#000000”,
笔划不透明度:1.0,
冲程重量:3
}
poly=新的google.maps.Polyline(多选项);
poly.setMap(map);
var路径=新的MVCArray;
//每次更新路径时,地图都会自动更新多段线
poly.setPath(path);
$.getJSON('json.php',函数(数据){
//var项目=[];
$。每个(数据、函数(键、值){
push(新的google.maps.LatLng(val.lat,val.longi));
});
});
变量myOptions={
缩放:12,
//中心:myLatLng,
mapTypeId:google.maps.mapTypeId.TERRAIN
};
}
要从mysql数据库填充javascript数组(其余的,如我所见,您知道如何操作):
如果您想运行并测试它,只需在脚本之前包含适当的html头标记,然后再添加(显然您会删除结束脚本和开始脚本标记-用于样式)
我已经添加了两个答案的元素,但是当我加载页面时,我得到了一个MVCArray not defined错误…想法?不要使用MVCArray,只需创建一个普通数组:var path=[];
<?php
//replace this to load from database
// populate array
for($j=0;$j<10;$j++){
$arrayData[$j] = $j*3;
}
?>
<script language="javascript" type="text/javascript">
<!--
var myArray = new Array();
<?php
//populate JS array
for($i=0;$i<10;$i++){
?>
myArray[<?php echo $i;?>]="<?php echo $arrayData[$i];?>";
<?php }?>
-->
</script>
<script language="javascript" type="text/javascript">
<!--
function showData(){
for (var i=0;i<myArray.length;i++){
document.getElementById('output').innerHTML += "array position: "+i+" array content: "+myArray[i]+"<br>";
}
}
-->
</script>
</head>
<body onLoad="showData();">
<div id="output"></div>
</body>
</html>