[英]How to find the lat lng from a geocoded address?
我正在嘗試創建一個Gmap,以允許人們對地址進行地理編碼並找到相應的lat lng。 我希望以我已經創建的形式看到這一點。 此外,我希望能夠在拖動標記時更改坐標。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="UTF-8">
<title>Geocoder 10</title>
<style>
#map_canvas { width:400px; height:450px; }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
var geocoder;
var map;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-30.070, -51.190);
var myOptions = {
zoom: 9,
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,
position: results[0].geometry.location,
draggable: true,
});
} else {
alert("Geocode was not successful for the following reason: " + status);
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
<div>
<input id="address" type="textbox" value="">
<input type="button" value="Localizar!" onclick="codeAddress()"><br>
Latitude: <input type="text" id="lat"><br>
Longitude: <input type="text" id="lng"><br>
</div>
</body>
</html>
在地理編碼器內部回撥這樣做:
document.getElementById('lat').value = results[0].geometry.location.lat();
document.getElementById('lng').value = results[0].geometry.location.lng();
好的......這是我想要的代碼。 它可能不那么優雅,但它有效。 我使用getPosition()方法獲取坐標,只需點擊地理編碼標記即可!
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no">
<meta charset="UTF-8">
<title>Geocoder</title>
<style>
#map_canvas { width:400px; height:450px; }
</style>
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
var geocoder;
var map;
function initialize() {
geocoder = new google.maps.Geocoder();
var latlng = new google.maps.LatLng(-30.070, -51.190);
var myOptions = {
zoom: 9,
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,
position: results[0].geometry.location,
draggable: true,
});
} else {
alert("Geocode was not successful for the following reason: " + status);
}
google.maps.event.addListener(marker, 'click', function() {
document.getElementById('coords').value = marker.getPosition();
});
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
<div id="info"></div>
<div>
<input id="address" type="textbox" value="">
<input type="button" value="Localizar!" onclick="codeAddress()"><br>
<input type="textbox" id="coords">
</div>
</body>
</html>
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