[英]How can I get the smallest LatLngBounds that still contains a set of Lat/Long Coordinates in Google Maps JS API?
I need to plot a set of coordinates on the map in response to a user selection, and when it happens, I'd like to pan the map to focus on that set of points. 我需要在地图上绘制一组坐标以响应用户选择,当它发生时,我想平移地图以专注于那组点。 How can I find the smallest bounding box (LatLngBounds) that contains all of the coordinates?
如何找到包含所有坐标的最小边界框(LatLngBounds)?
In addition to the Stack Overflow post which @Crescent Fresh pointed to above (which is using the v2 API), the method you'd want to use is the LatLngBounds.extend()
. 除了@Crescent Fresh上面指出的Stack Overflow帖子 (使用v2 API)之外,你想要使用的方法是
LatLngBounds.extend()
。
Here's a complete example, using the v3 API : 以下是使用v3 API的完整示例:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps LatLngBounds.extend() Demo</title>
<script src="http://maps.google.com/maps/api/js?sensor=false"
type="text/javascript"></script>
</head>
<body>
<div id="map" style="width: 400px; height: 300px;"></div>
<script type="text/javascript">
var map = new google.maps.Map(document.getElementById('map'), {
mapTypeId: google.maps.MapTypeId.TERRAIN
});
var markerBounds = new google.maps.LatLngBounds();
var randomPoint, i;
for (i = 0; i < 10; i++) {
// Generate 10 random points within North East America
randomPoint = new google.maps.LatLng( 39.00 + (Math.random() - 0.5) * 20,
-77.00 + (Math.random() - 0.5) * 20);
// Draw a marker for each random point
new google.maps.Marker({
position: randomPoint,
map: map
});
// Extend markerBounds with each random point.
markerBounds.extend(randomPoint);
}
// At the end markerBounds will be the smallest bounding box to contain
// our 10 random points
// Finally we can call the Map.fitBounds() method to set the map to fit
// our markerBounds
map.fitBounds(markerBounds);
</script>
</body>
</html>
Screenshot: 截图:
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.