javascript – 如何从Google版本地图中的拖动标记获取格式化地址
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内容图文
我制作了一张Google地图,可让您在文本字段中输入地址.然后它会导航到您在文本字段中输入的地址,并留下一个可拖动的标记,拖动时会显示Lat和Long以及Geolocated Address.
我不是显示上面的地址,而是当你拖动标记在底部角落显示标记的地址而不是文本字段中输入的地址时.
我尝试过多种方法无济于事. lonlat [0] .formatted_address是我尝试的一些事情之一.
我从Google获得了参考
我的代码如下：
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Google Maps JavaScript API v3 Example: Geocoding Simple</title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script src="http://maps.google.com/maps/api/js?v=3.5&sensor=false"></script>
<script type="text/javascript">
var geocoder;
var map;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var myOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
}
function codeAddress() {
var address = document.getElementById("address").value;
geocoder.geocode( { 'address': address}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
var marker = new google.maps.Marker({
map: map,
draggable: true,
position: results[0].geometry.location
});
// Javascript//
google.maps.event.addListener(marker, 'dragend', function(evt){
document.getElementById('current').innerHTML = '<p>Marker dropped: Current Lat: ' + evt.latLng.lat().toFixed(3) + ' Current Lng: ' + evt.latLng.lng().toFixed(3) + '</p>';
});
google.maps.event.addListener(marker, 'dragstart', function(evt){
document.getElementById('current').innerHTML = '<p>Currently dragging marker...</p>';
});
google.maps.event.addListener(marker, 'dragend', function(evt){
document.getElementById('info').innerHTML = '<p>Address: ' + results[0].formatted_address + '</p>';
});
google.maps.event.addListener(marker, 'dragstart', function(evt){
document.getElementById('info').innerHTML = '<p>Currently dragging marker...</p>';
});
map.setCenter(marker.position);
marker.setMap(map);
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
</script>
<style type="text/css">
#controls {
position: absolute;
bottom: 1em;
left: 100px;
width: 400px;
z-index: 20000;
padding: 0 0.5em 0.5em 0.5em;
}
html, body, #map_canvas {
margin: 0;
width: 100%;
height: 100%;
}
</style>
</head>
<body onl oad="initialize()">
<div id="controls">
<input id="address" type="textbox" value="Sydney, NSW">
<input type="button" value="Geocode" onClick="codeAddress()">
<div id="current" style="background-color:white;">Nothing yet...</div>
<div id="info" style="background-color:white;">Address:</div>
</div>
</div>
<div id="map_canvas"></div>
</body>
</html>
解决方法:
您需要使用反向地理编码服务(如链接到的示例中所示)来检索格式化的地址.
该示例中的此代码调用反向地理编码器并使用响应显示由其返回的formatted_address：
function geocodePosition(pos) {
geocoder.geocode({
latLng: pos
}, function(responses) {
if (responses && responses.length > 0) {
updateMarkerAddress(responses[0].formatted_address);
} else {
updateMarkerAddress('Cannot determine address at this location.');
}
});
}
这是调用它的dragend监听器：
google.maps.event.addListener(marker, 'dragend', function() {
updateMarkerStatus('Drag ended');
geocodePosition(marker.getPosition());
});
Here is a working example (puts the address received from the reverse geocoder in the infowindow)
代码段：
var geocoder;
var map;
var marker;
var infowindow = new google.maps.InfoWindow({
size: new google.maps.Size(150, 50)
});
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-34.397, 150.644);
var mapOptions = {
zoom: 8,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById('map_canvas'), mapOptions);
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
}
function geocodePosition(pos) {
geocoder.geocode({
latLng: pos
}, function(responses) {
if (responses && responses.length > 0) {
marker.formatted_address = responses[0].formatted_address;
} else {
marker.formatted_address = 'Cannot determine address at this location.';
}
infowindow.setContent(marker.formatted_address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
infowindow.open(map, marker);
});
}
function codeAddress() {
var address = document.getElementById('address').value;
geocoder.geocode({
'address': address
}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
map.setCenter(results[0].geometry.location);
if (marker) {
marker.setMap(null);
if (infowindow) infowindow.close();
}
marker = new google.maps.Marker({
map: map,
draggable: true,
position: results[0].geometry.location
});
google.maps.event.addListener(marker, 'dragend', function() {
geocodePosition(marker.getPosition());
});
google.maps.event.addListener(marker, 'click', function() {
if (marker.formatted_address) {
infowindow.setContent(marker.formatted_address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
} else {
infowindow.setContent(address + "<br>coordinates: " + marker.getPosition().toUrlValue(6));
}
infowindow.open(map, marker);
});
google.maps.event.trigger(marker, 'click');
} else {
alert('Geocode was not successful for the following reason: ' + status);
}
});
}
google.maps.event.addDomListener(window, "load", initialize);html,
body {
height: 100%;
margin: 0;
padding: 0;
}
#map_canvas {
height: 100%;
}
@media print {
html,
body {
height: auto;
}
#map_canvas {
height: 650px;
}
}<script src="https://maps.googleapis.com/maps/api/js"></script>
<div>
<input id="address" type="textbox" value="Sydney, NSW">
<input type="button" value="Geocode" onclick="codeAddress()">
</div>
<div id="map_canvas" style="height:90%;top:30px"></div>内容总结
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