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javascript - Google Maps API 3 - 限制平移/ map 边界

转载 作者:数据小太阳 更新时间:2023-10-29 05:41:05 25 4
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我完全不熟悉 Google map ,正在创建我的第一张 map ,以便将其整合到我的网站中。

我试图将用户可以移动的区域限制在英国,并查看了这里的几篇帖子,它们都给出了非常相似的答案,但是我无法让代码为我工作. This solution is the closest that I have got但是,每当我尝试完全移动 map 时,它都会以我的一个边界点为中心,而且我无法将其移动到其他任何地方。

我可能犯了一个非常愚蠢的错误,在这种情况下我深表歉意,但我无法弄清楚哪里出了问题。有人有什么想法吗?

谢谢

我的代码如下(取自 Google 的示例代码,然后添加到)- 与边界相关的部分靠近底部,从为英国设置边界开始:

    <!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<title>Google Maps</title>
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?key=MYKEY&sensor=false">
</script>

<?
//code to get long and lat from http://www.webmonkey.com/2010/02/get_started_with_google_geocoding_via_http
$apikey = MYKEY;
$geourl = "http://maps.google.com/maps/geo?q=LS255AA&output=csv&key=$apikey";

// Create cUrl object to grab XML content using $geourl
$c = curl_init();
curl_setopt($c, CURLOPT_URL, $geourl);
curl_setopt($c, CURLOPT_RETURNTRANSFER, 1);
$csvContent = trim(curl_exec($c));
curl_close($c);

// Split pieces of data by the comma that separates them
list($httpcode, $elev, $lat, $long) = split(",", $csvContent);
?>

<script type="text/javascript">
var lat = "<?= $lat ?>";
var long = "<?= $long ?>";
</script>

<script type="text/javascript">
function initialize() {
//sets the long and lat of map
var myLatlng = new google.maps.LatLng(lat, long);

//options for the map
var myOptions = {
center: myLatlng,
zoom: 9,
mapTypeId: google.maps.MapTypeId.ROADMAP
};

//creates the map
var mymap = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);

//sets min and max zoom values
var opt = { minZoom: 7, maxZoom: 11 };
mymap.setOptions(opt);

//creates marker
var marker = new google.maps.Marker({
position: myLatlng,
map: mymap,
title:"Hello World!"
});

//content of infowindow
var contentString = '<h2>I am an info window</h2>'+'<p>Hello my name is infowindow, I need more text to test how big I get</p>';

//creates infowindow
var infowindow = new google.maps.InfoWindow({
content: contentString,
});

//infowindow options
infowindow.setOptions({maxWidth:200});

//listens for click and opens infowindow
google.maps.event.addListener(marker, 'click', function() {
infowindow.open(mymap,marker);
});
// Bounds for UK
var strictBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(60.88770, -0.83496),
new google.maps.LatLng(49.90878, -7.69042)
);

// Listen for the dragend event
google.maps.event.addListener(mymap, 'dragend', function() {
if (strictBounds.contains(mymap.getCenter())) return;

// We're out of bounds - Move the map back within the bounds
var c = mymap.getCenter(),
x = c.lng(),
y = c.lat(),
maxX = strictBounds.getNorthEast().lng(),
maxY = strictBounds.getNorthEast().lat(),
minX = strictBounds.getSouthWest().lng(),
minY = strictBounds.getSouthWest().lat();

if (x < minX) x = minX;
if (x > maxX) x = maxX;
if (y < minY) y = minY;
if (y > maxY) y = maxY;

mymap.setCenter(new google.maps.LatLng(y, x));
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:50%; height:50%"></div>

</body>
</html>

最佳答案

对于像我一样偶然发现此页面上现已过时的信息的任何人, map API 现在提供了一种内置方法来通过 restriction 属性限制 map 视口(viewport)边界MapOptions 接口(interface),参见文档 here .此示例限制南北平移显示南极洲:

function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
center: {lat: 20, lng: -52},
zoom: 3,
restriction: {latLngBounds:{north: 83.8, south: -57, west: -180, east: 180}}
});
}

关于javascript - Google Maps API 3 - 限制平移/ map 边界,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9099345/

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