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
我知道这个答案太迟了。但我希望这也能帮助到其他开发者。: -) 下面的代码将使用信息窗口在谷歌地图上添加多个标记。 这段代码可以用来在地图上绘制任意数量的标记。 请将您的谷歌映射API键放在此代码的正确位置。(我已将其标记为“您的API密钥”)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Google Map</title>
<style>
#map{
height: 600px;
width: 100%;
}
</style>
</head>
<body>
<h1>My Google Map`</h1>
<div id="map"></div>
<script>
function initMap(){
//Map options
var options = {
zoom:9,
center:{lat:42.3601, lng:-71.0589}
}
// new map
var map = new google.maps.Map(document.getElementById('map'), options);
// customer marker
var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/parking_lot_maps.png';
//array of Marrkeers
var markers = [
{
coords:{lat: 42.4668, lng: -70.9495},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.8584, lng: -70.9300},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.7762, lng: -71.0773},img:iconBase,con:'<h3> This Is your Content <h3>'
}
];
//loopthrough markers
for(var i = 0; i <markers.length; i++){
//add markeers
addMarker(markers[i]);
}
//function for the plotting markers on the map
function addMarker (props){
var marker = new google.maps.Marker({
position: props.coords,
map:map,
icon:props.img
});
var infoWindow = new google.maps.InfoWindow({
content:props.con,
});
marker.addListener("click", () => {
infoWindow.open(map, marker);
});
}
}
</script>
<script
src="https://maps.googleapis.com/maps/api/js?key=**YourAPIKey**&callback=initMap"
defer
></script>
</body>
</html>
其他回答
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。
异步版本:
<script type="text/javascript">
function initialize() {
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]
];
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 10,
center: new google.maps.LatLng(-33.92, 151.25),
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var infowindow = new google.maps.InfoWindow();
var marker, i;
for (i = 0; i < locations.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(locations[i][1], locations[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(locations[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
}
function loadScript() {
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://maps.googleapis.com/maps/api/js?v=3.exp&' +
'callback=initialize';
document.body.appendChild(script);
}
window.onload = loadScript;
</script>
我知道这个答案太迟了。但我希望这也能帮助到其他开发者。: -) 下面的代码将使用信息窗口在谷歌地图上添加多个标记。 这段代码可以用来在地图上绘制任意数量的标记。 请将您的谷歌映射API键放在此代码的正确位置。(我已将其标记为“您的API密钥”)
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>My Google Map</title>
<style>
#map{
height: 600px;
width: 100%;
}
</style>
</head>
<body>
<h1>My Google Map`</h1>
<div id="map"></div>
<script>
function initMap(){
//Map options
var options = {
zoom:9,
center:{lat:42.3601, lng:-71.0589}
}
// new map
var map = new google.maps.Map(document.getElementById('map'), options);
// customer marker
var iconBase = 'https://maps.google.com/mapfiles/kml/shapes/parking_lot_maps.png';
//array of Marrkeers
var markers = [
{
coords:{lat: 42.4668, lng: -70.9495},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.8584, lng: -70.9300},img:iconBase,con:'<h3> This Is your Content <h3>'
},
{
coords:{lat: 42.7762, lng: -71.0773},img:iconBase,con:'<h3> This Is your Content <h3>'
}
];
//loopthrough markers
for(var i = 0; i <markers.length; i++){
//add markeers
addMarker(markers[i]);
}
//function for the plotting markers on the map
function addMarker (props){
var marker = new google.maps.Marker({
position: props.coords,
map:map,
icon:props.img
});
var infoWindow = new google.maps.InfoWindow({
content:props.con,
});
marker.addListener("click", () => {
infoWindow.open(map, marker);
});
}
}
</script>
<script
src="https://maps.googleapis.com/maps/api/js?key=**YourAPIKey**&callback=initMap"
defer
></script>
</body>
</html>
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>
我想我将把这个放在这里，因为它似乎是那些开始使用谷歌地图API的一个流行的着陆点。在客户端呈现多个标记可能是许多映射应用程序性能下降的原因。很难进行基准测试、修复，在某些情况下甚至很难确定存在问题(由于浏览器实现的差异、客户端可用的硬件、移动设备等等)。
开始解决这个问题的最简单方法是使用标记集群解决方案。其基本思想是将地理上相似的位置分组，并显示点的数量。当用户放大地图时，这些组会展开，显示出下面的单个标记。
也许最简单的实现是markerclusterer库。基本实现如下(在库导入之后):
<script type="text/javascript">
function initialize() {
var center = new google.maps.LatLng(37.4419, -122.1419);
var map = new google.maps.Map(document.getElementById('map'), {
zoom: 3,
center: center,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var markers = [];
for (var i = 0; i < 100; i++) {
var location = yourData.location[i];
var latLng = new google.maps.LatLng(location.latitude,
location.longitude);
var marker = new google.maps.Marker({
position: latLng
});
markers.push(marker);
}
var markerCluster = new MarkerClusterer({map, markers});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
标记不是直接添加到映射中，而是添加到数组中。然后将该数组传递给为您处理复杂计算的库，并将其附加到映射。
这些实现不仅极大地提高了客户端性能，而且在许多情况下，它们还会导致更简单、更整洁的UI，更容易在更大范围内消化数据。
谷歌提供了其他实现。
希望这能帮助到那些刚接触映射的人。
