我正在使用JavaScript学习Google地图。我遵循的是教程代码，到目前为止，我的地图上带有一些标记，这些标记聚集在缩小上。这是代码-
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="utf-8">
<title>Marker Clustering</title>
<style>
#map {
height: 500px;
}
html, body {
height: 100%;
margin: 0;
padding: 0;
}
</style>
</head>
<body>
<div id="map"></div>
<script>
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 3,
center: {lat: -28.024, lng: 140.887}
});
var markers = locations.map(function(location) {
return new google.maps.Marker({
position: location
});
});
// Add a marker clusterer to manage the markers.
var markerCluster = new MarkerClusterer(map, markers,
{imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m'}
);
google.maps.event.addListener(markerCluster, 'clusterclick', function(cluster) {
console.log(markerCluster.getGridSize());
});
}
var locations = [
{lat: -31.563910, lng: 147.154312},
{lat: -33.718234, lng: 150.363181},
{lat: -33.727111, lng: 150.371124},
{lat: -33.848588, lng: 151.209834},
{lat: -33.851702, lng: 151.216968},
{lat: -34.671264, lng: 150.863657},
{lat: -35.304724, lng: 148.662905},
{lat: -36.817685, lng: 175.699196},
{lat: -36.828611, lng: 175.790222},
{lat: -37.750000, lng: 145.116667},
{lat: -37.759859, lng: 145.128708},
{lat: -37.765015, lng: 145.133858},
{lat: -37.770104, lng: 145.143299},
{lat: -37.773700, lng: 145.145187},
{lat: -37.774785, lng: 145.137978},
{lat: -37.819616, lng: 144.968119},
{lat: -38.330766, lng: 144.695692},
{lat: -39.927193, lng: 175.053218},
{lat: -41.330162, lng: 174.865694},
{lat: -42.734358, lng: 147.439506},
{lat: -42.734358, lng: 147.501315},
{lat: -42.735258, lng: 147.438000},
{lat: -43.999792, lng: 170.463352}
]
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/js-marker-clusterer/1.0.0/markerclusterer_compiled.js">
</script>
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=APIKEYHERE&callback=initMap">
</script>
</body>
</html>
我想在单击集群时获得集群的大小，到目前为止，我正在使用getGridSize进行获取，但是它返回以像素为单位的值。无论如何，我可以用米或公里来获得此值吗？
您可能应该使用MarkerClustererPlus，它比您使用的https://github.com/googlemaps/v3-utility-library/tree/master/packages/markerclustererplus更新。>
您可以使用Marker Clusterer创建的叠加层，并使用其投影转换2个点，这些点之间用n
像素分隔，其中n是您的网格大小。您可以使用fromContainerPixelToLatLng方法。然后您可以使用fromContainerPixelToLatLng方法，通过使用Geometry库（您需要在API调用中包括它）来计算2个LatLng点之间的距离。
computeDistanceBetweenherevar map; var markers = []; var markerCluster; function initialize() { var center = new google.maps.LatLng(0, 0); map = new google.maps.Map(document.getElementById('map'), { zoom: 3, minZoom: 1, center: center, scaleControl: true, mapTypeId: google.maps.MapTypeId.ROADMAP }); // Cluster all the markers markerCluster = new MarkerClusterer(map, markers, { imagePath: 'https://ccplugins.co/markerclusterer/images/m', gridSize: 100, minimumClusterSize: 10 }); google.maps.event.addListener(map, 'idle', function() { getGridSizeInMeters(); }); } function getGridSizeInMeters() { var size = markerCluster.getGridSize(); var p1 = markerCluster.getProjection().fromContainerPixelToLatLng(new google.maps.Point(0, 0)); var p2 = markerCluster.getProjection().fromContainerPixelToLatLng(new google.maps.Point(0, size)); var meters = google.maps.geometry.spherical.computeDistanceBetween(p1, p2); console.log('Grid size is %i meters / %i kilometers', meters, meters / 1000); } google.maps.event.addDomListener(window, 'load', initialize);