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javascript - 如何在 Google Maps JS API 中获得仍然包含一组 Lat/Long 坐标的最小 LatLngBounds?

转载 作者:数据小太阳 更新时间:2023-10-29 05:51:04 24 4
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我需要在 map 上绘制一组坐标以响应用户的选择,当它发生时,我想平移 map 以关注那组点。如何找到包含所有坐标的最小边界框 (LatLngBounds)?

最佳答案

除了Stack Overflow post which @Crescent Fresh pointed to above (使用 v2 API),您要使用的方法是 LatLngBounds.extend() .

这是一个完整的例子,使用 v3 API :

<!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>

截图:

Google Maps LatLngBounds.extend() Demo

关于javascript - 如何在 Google Maps JS API 中获得仍然包含一组 Lat/Long 坐标的最小 LatLngBounds?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/3373219/

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