如何设置Google地图缩放级别以显示所有标记？
[英]How to set the Google Map zoom level to show all the markers?
问题描述
How do I set the zoom level to show all the markers on Google Maps? 
如何设置缩放级别以显示Google地图上的所有标记？
In my Google Map there are different markers in different positions. 在我的Google地图中，不同位置有不同的标记。 I want to set google map zoom level based on the range of markers (that means in the view of google map, i want to see all markers) 我想根据标记的范围设置谷歌地图缩放级别（这意味着在谷歌地图的视图中，我想看到所有标记）
4 个解决方案
解决方案1
29 已采纳 2010-03-02 10:31:06
There you go: 你去：
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps getBoundsZoomLevel Demo</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false"
type="text/javascript"></script>
</head>
<body onunload="GUnload()">
<div id="map" style="width: 400px; height: 300px"></div>
<script type="text/javascript">
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map"));
var markerBounds = new GLatLngBounds();
for (var i = 0; i < 10; i++) {
var randomPoint = new GLatLng( 39.00 + (Math.random() - 0.5) * 20,
-77.00 + (Math.random() - 0.5) * 20);
map.addOverlay(new GMarker(randomPoint));
markerBounds.extend(randomPoint);
}
map.setCenter(markerBounds.getCenter(),
map.getBoundsZoomLevel(markerBounds));
}
</script>
</body>
</html>
We are creating 10 random points in the above example and then passing each point to GLatLngBounds.extend() . 我们在上面的例子中创建了10个随机点，然后将每个点传递给GLatLngBounds.extend() 。 Finally we get the correct zoom level with GMap2.getBoundsZoomLevel() . 最后，我们使用GMap2.getBoundsZoomLevel()获得正确的缩放级别。
解决方案2
22 2011-11-23 05:55:38
If you are using API version 3 you can replace 如果您使用的是API版本3，则可以替换
map.setCenter(markerBounds.getCenter(), map.getBoundsZoomLevel(markerBounds));
with 同
map.fitBounds(markerBounds).
解决方案3
20 2013-12-01 20:06:04
set the Google Map zoom level to show all the markers?
Maps API v3 Maps API v3
- get markers 得到标记
- get boundaries of markers 获得标记的边界
- set center on map by fitting it to marker boundaries 通过将其拟合到标记边界来设置地图中心
var markers = [markerObj1, markerObj2, markerObj3];
var newBoundary = new google.maps.LatLngBounds();
for(index in markers){
var position = markers[index].position;
newBoundary.extend(position);
}
map.fitBounds(newBoundary);
The code above will automaticlly center and zoom your map so that all markers are visible. 上面的代码将自动居中并缩放地图，以便所有标记都可见。
解决方案4
3 2010-03-02 10:42:30
You can use the extend method of the GLatLngBounds object, which represents a rectangle on the map. 您可以使用GLatLngBounds对象的extend方法，该方法表示地图上的矩形。
var bounds = new GLatLngBounds();
Loop around all the points on your map, extending the bounds of your GLatLngBounds object for each one. 循环遍历地图上的所有点 ，为每个点扩展GLatLngBounds对象的边界。
bounds.extend(myPoint);
Finally you can use your bounds object to set the centre and zoom of your map (where map is your map object) 最后，您可以使用bounds对象设置地图的中心和缩放（ map是地图对象）
map.setCenter(bounds.getCenter(), map.getBoundsZoomLevel(bounds));
声明:本站的技术帖子网页，遵循CC BY-SA 4.0协议，如果您需要转载，请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.