23

I have made a Google map that lets you input an address into a text field. It then navigates you to the address that you entered into the text field and leaves a draggable marker that when dragged shows you the Lat and Long and The Geolocated Address.

I instead of displaying the above address, would like when you drag the marker to display in the bottom corner the Address of the Marker and the not the inputted address from the text field.

I have tried a number of methods to no avail. lonlat[0].formatted_address was amongst some of the things i tried.

I got my reference from Google

My code is below:

<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&amp;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 onLoad="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>
4

1 回答 1

47

您需要使用反向地理编码服务（如您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来显示它返回的 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 侦听器：

  google.maps.event.addListener(marker, 'dragend', function() {
    updateMarkerStatus('Drag ended');
    geocodePosition(marker.getPosition());
  });

这是一个工作示例（将从反向地理编码器接收到的地址放在信息窗口中）

代码片段：

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?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk"></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>

于 2012-10-10T22:21:29.620 回答