Google Maps API 3 - 限制平移/地图边界 [英] Google Maps API 3 - limit pan/map bounds
问题描述
我对 Google 地图完全陌生，正在创建我的第一张地图，以便可以将其合并到我的网站中.
I am completely new to Google Maps and am just creating my first map so that I can incorporate it into my website.
我试图将用户可以移动的区域限制在英国，并查看了此处的几篇帖子，所有帖子都给出了非常相似的答案，但是我无法让代码对我有用.这个解决方案是我得到的最接近的解决方案每当我尝试移动地图时，它都会以我的边界点之一为中心，而我无法将其移动到其他任何地方.
I am trying to limit the area that the user can move around to just the UK and have looked at several posts on here that all give very similar answers, however I haven't been able to get the code to work for me. This solution is the closest that I have got however whenever I try and move the map at all it centers on one of my boundary points and I am unable to move it anywhere else.
我可能犯了一个非常愚蠢的错误，在这种情况下我道歉，但我无法弄清楚出了什么问题.有没有人有任何想法?
I may have made a really silly mistake, in which case I apologise, however I can't work out what is wrong. Does anyone have any ideas?
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:
My code is below (taken from Google's sample code and then added to) - the part that is relevant to the bounds is near the bottom, starting with setting the bounds for the UK:
<!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>
推荐答案
您的 strictBounds 混淆了 - 更改它们的顺序，它应该可以正常工作.
You have your strictBounds mixed up - change the order of them and it should work fine.
A LatLngBounds 应该是 SW 角第一，NE 角第二:http://code.google.com/apis/maps/documentation/javascript/reference.html#LatLngBounds
A LatLngBounds should be SW corner first, NE corner second:
http://code.google.com/apis/maps/documentation/javascript/reference.html#LatLngBounds
var strictBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(49.90878, -7.69042),
new google.maps.LatLng(60.88770, -0.83496)
);
这篇关于Google Maps API 3 - 限制平移/地图边界的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
