谷歌Maps Api相当新。我有一个数据数组，我想循环遍历并在地图上绘制。看似相当简单，但我发现的所有多标记教程都相当复杂。
让我们以谷歌网站的数据数组为例:
var locations = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
我只是想绘制所有这些点，并在单击时弹出一个infoWindow来显示名称。
当前回答
当前地图标记和聚类算法修改后的最新最简单算法:
修改地址:https://developers.google.com/maps/documentation/javascript/marker-clustering
<!DOCTYPE Html>
<html>
<head>
<meta Content-Security-Policy="default-src 'self'; script-src 'self' 'unsafe-eval' https://*/;">
<link type="text/css" href="http://www.mapsmarker.com/wp-content/uploads/leaflet-maps-marker-icons/bar_coktail.png">
<link rel="icon" href="data:,">
<title>App</title>
</head>
<style type="text/css">
#map {
height: 500
}
</style>
<body>
<div id='map' style="width:100%; height:400px"></div>
<script type='text/javascript'>
function initMap() {
maps = new google.maps.Map(document.getElementById('map'), {
center: new google.maps.LatLng(12.9824855, 77.637094),
zoom: 5,
disableDefaultUI: false,
mapTypeId: google.maps.MapTypeId.HYBRID
});
var labels='ABCDEFGHIJKLMNOPQRSTUVWXYZ';
var markerImage = 'http://www.mapsmarker.com/wp-content/uploads/leaflet-maps-marker-icons/bar_coktail.png';
marker = locations.map(function (location, i) {
return new google.maps.Marker({
position: new google.maps.LatLng(location.lat, location.lng),
map: maps,
title: "Map",
label: labels[i % labels.length],
icon: markerImage
});
});
var markerCluster = new MarkerClusterer(maps, marker, {
imagePath: 'https://developers.google.com/maps/documentation/javascript/examples/markerclusterer/m'
});
}
var locations = [
{ lat: 12.9824855, lng: 77.637094},
{ lat: 11.9824855, lng: 77.154312 },
{ lat: 12.8824855, lng: 77.637094},
{ lat: 10.8824855, lng: 77.054312 },
{ lat: 12.9824855, lng: 77.637094},
{ lat: 11.9824855, lng: 77.154312 },
{ lat: 12.8824855, lng: 77.637094},
{ lat: 13.8824855, lng: 77.054312 },
{ lat: 14.9824855, lng: 54.637094},
{ lat: 15.9824855, lng: 54.154312 },
{ lat: 16.8824855, lng: 53.637094},
{ lat: 17.8824855, lng: 52.054312 },
{ lat: 18.9824855, lng: 51.637094},
{ lat: 19.9824855, lng: 69.154312 },
{ lat: 20.8824855, lng: 68.637094},
{ lat: 21.8824855, lng: 67.054312 },
{ lat: 12.9824855, lng: 76.637094},
{ lat: 11.9824855, lng: 75.154312 },
{ lat: 12.8824855, lng: 74.637094},
{ lat: 10.8824855, lng: 74.054312 },
{ lat: 12.9824855, lng: 73.637094},
{ lat: 3.9824855, lng: 72.154312 },
{ lat: 2.8824855, lng: 71.637094},
{ lat: 1.8824855, lng: 70.054312 }
];
</script>
<script src="https://unpkg.com/@google/markerclustererplus@4.0.1/dist/markerclustererplus.min.js">
</script>
<script src="https:maps.googleapis.com/maps/api/js?key=AIzaSyDWu6_Io9xA1oerfOxE77YAv31etN4u3Dw&callback=initMap">
</script>
<script type='text/javascript'></script>
其他回答
已接受的答案，在ES6中重写:
$(document).ready(() => {
const mapEl = $('#our_map').get(0); // OR document.getElementById('our_map');
// Display a map on the page
const map = new google.maps.Map(mapEl, { mapTypeId: 'roadmap' });
const buildings = [
{
title: 'London Eye, London',
coordinates: [51.503454, -0.119562],
info: 'carousel'
},
{
title: 'Palace of Westminster, London',
coordinates: [51.499633, -0.124755],
info: 'palace'
}
];
placeBuildingsOnMap(buildings, map);
});
const placeBuildingsOnMap = (buildings, map) => {
// Loop through our array of buildings & place each one on the map
const bounds = new google.maps.LatLngBounds();
buildings.forEach((building) => {
const position = { lat: building.coordinates[0], lng: building.coordinates[1] }
// Stretch our bounds to the newly found marker position
bounds.extend(position);
const marker = new google.maps.Marker({
position: position,
map: map,
title: building.title
});
const infoWindow = new google.maps.InfoWindow();
// Allow each marker to have an info window
google.maps.event.addListener(marker, 'click', () => {
infoWindow.setContent(building.info);
infoWindow.open(map, marker);
})
// Automatically center the map fitting all markers on the screen
map.fitBounds(bounds);
})
})
下面是另一个使用唯一标题和infoWindow文本加载多个标记的示例。使用最新的谷歌映射API V3.11进行测试。
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
<title>Multiple Markers Google Maps</title>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<script
src="https://maps.googleapis.com/maps/api/js?v=3.11&sensor=false"
type="text/javascript"
></script>
<script type="text/javascript">
// check DOM Ready
$(document).ready(function () {
// execute
(function () {
// map options
var options = {
zoom: 5,
center: new google.maps.LatLng(39.909736, -98.522109), // centered US
mapTypeId: google.maps.MapTypeId.TERRAIN,
mapTypeControl: false,
};
// init map
var map = new google.maps.Map(
document.getElementById('map_canvas'),
options
);
// NY and CA sample Lat / Lng
var southWest = new google.maps.LatLng(40.744656, -74.005966);
var northEast = new google.maps.LatLng(34.052234, -118.243685);
var lngSpan = northEast.lng() - southWest.lng();
var latSpan = northEast.lat() - southWest.lat();
// set multiple marker
for (var i = 0; i < 250; i++) {
// init markers
var marker = new google.maps.Marker({
position: new google.maps.LatLng(
southWest.lat() + latSpan * Math.random(),
southWest.lng() + lngSpan * Math.random()
),
map: map,
title: 'Click Me ' + i,
});
// process multiple info windows
(function (marker, i) {
// add click event
google.maps.event.addListener(marker, 'click', function () {
infowindow = new google.maps.InfoWindow({
content: 'Hello, World!!',
});
infowindow.open(map, marker);
});
})(marker, i);
}
})();
});
</script>
</head>
<body>
<div id="map_canvas" style="width: 800px; height: 500px"></div>
</body>
</html>
250个标记的截图:
它将自动随机化Lat/Lng，使其独一无二。如果你想测试500、1000、xxx标记和性能，这个例子将非常有用。
来自谷歌Map API示例:
function initialize() {
var myOptions = {
zoom: 10,
center: new google.maps.LatLng(-33.9, 151.2),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"),
myOptions);
setMarkers(map, beaches);
}
/**
* Data for the markers consisting of a name, a LatLng and a zIndex for
* the order in which these markers should display on top of each
* other.
*/
var beaches = [
['Bondi Beach', -33.890542, 151.274856, 4],
['Coogee Beach', -33.923036, 151.259052, 5],
['Cronulla Beach', -34.028249, 151.157507, 3],
['Manly Beach', -33.80010128657071, 151.28747820854187, 2],
['Maroubra Beach', -33.950198, 151.259302, 1]
];
function setMarkers(map, locations) {
// Add markers to the map
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var image = new google.maps.MarkerImage('images/beachflag.png',
// This marker is 20 pixels wide by 32 pixels tall.
new google.maps.Size(20, 32),
// The origin for this image is 0,0.
new google.maps.Point(0,0),
// The anchor for this image is the base of the flagpole at 0,32.
new google.maps.Point(0, 32));
var shadow = new google.maps.MarkerImage('images/beachflag_shadow.png',
// The shadow image is larger in the horizontal dimension
// while the position and offset are the same as for the main image.
new google.maps.Size(37, 32),
new google.maps.Point(0,0),
new google.maps.Point(0, 32));
// Shapes define the clickable region of the icon.
// The type defines an HTML <area> element 'poly' which
// traces out a polygon as a series of X,Y points. The final
// coordinate closes the poly by connecting to the first
// coordinate.
var shape = {
coord: [1, 1, 1, 20, 18, 20, 18 , 1],
type: 'poly'
};
for (var i = 0; i < locations.length; i++) {
var beach = locations[i];
var myLatLng = new google.maps.LatLng(beach[1], beach[2]);
var marker = new google.maps.Marker({
position: myLatLng,
map: map,
shadow: shadow,
icon: image,
shape: shape,
title: beach[0],
zIndex: beach[3]
});
}
}
下面是一个几乎完整的示例javascript函数，它允许在JSONObject中定义多个标记。
它将只显示在地图边界内的标记。
这很重要，这样你就不用做额外的工作了。
你也可以设置一个标记的限制，这样你就不会显示一个极端数量的标记(如果有可能在你的使用);
如果地图中心的变化不超过500米，就不会显示标记。 这很重要，因为如果用户单击标记并在此过程中意外地拖动了地图，您不希望地图重新加载标记。
我将这个函数附加到地图的空闲事件侦听器，因此标记只在地图空闲时显示，并在不同的事件后重新显示标记。
活动屏幕截图 在信息窗口中显示更多内容的屏幕截图有一个小变化。 粘贴自pastbin.com
<script src=“//pastebin.com/embed_js/uWAbRxfg”></script>
var arr = new Array();
function initialize() {
var i;
var Locations = [
{
lat:48.856614,
lon:2.3522219000000177,
address:'Paris',
gval:'25.5',
aType:'Non-Commodity',
title:'Paris',
descr:'Paris'
},
{
lat: 55.7512419,
lon: 37.6184217,
address:'Moscow',
gval:'11.5',
aType:'Non-Commodity',
title:'Moscow',
descr:'Moscow Airport'
},
{
lat:-9.481553000000002,
lon:147.190242,
address:'Port Moresby',
gval:'1',
aType:'Oil',
title:'Papua New Guinea',
descr:'Papua New Guinea 123123123'
},
{
lat:20.5200,
lon:77.7500,
address:'Indore',
gval:'1',
aType:'Oil',
title:'Indore, India',
descr:'Airport India'
}
];
var myOptions = {
zoom: 2,
center: new google.maps.LatLng(51.9000,8.4731),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map"), myOptions);
var infowindow = new google.maps.InfoWindow({
content: ''
});
for (i = 0; i < Locations.length; i++) {
size=15;
var img=new google.maps.MarkerImage('marker.png',
new google.maps.Size(size, size),
new google.maps.Point(0,0),
new google.maps.Point(size/2, size/2)
);
var marker = new google.maps.Marker({
map: map,
title: Locations[i].title,
position: new google.maps.LatLng(Locations[i].lat, Locations[i].lon),
icon: img
});
bindInfoWindow(marker, map, infowindow, "<p>" + Locations[i].descr + "</p>",Locations[i].title);
}
}
function bindInfoWindow(marker, map, infowindow, html, Ltitle) {
google.maps.event.addListener(marker, 'mouseover', function() {
infowindow.setContent(html);
infowindow.open(map, marker);
});
google.maps.event.addListener(marker, 'mouseout', function() {
infowindow.close();
});
}
完整的工作示例。你可以复制，粘贴和使用。
