Question

我正在查看我发现的两个不同的地理编码示例，我希望充分利用这两个功能。我没有太多的地理编码经验，我发现谷歌文档难以遵循

除了用户使用鼠标滚轮时滚动，这个除了我想要的一切。 http://jsfiddle.net/Ep7Rr/

我想要这个，如果我可以让标记移动，因为用户像第一个一样拖动地图。http://jsfiddle.net/AjeTc/

我知道new GMap2和new google.maps.Geocoder

等方法有所不同

第一个使用此代码

<script>
function load() {
  if (GBrowserIsCompatible()){
    var map = new GMap2(document.getElementById("map"));
    map.addControl(new GSmallMapControl());
    map.addControl(new GMapTypeControl());
    var center = new GLatLng(54.18173, -6.35284);
    map.setCenter(center, 15);
    geocoder = new GClientGeocoder();
    var marker = new GMarker(center, {draggable: true});  
    map.addOverlay(marker);
    document.getElementById("lat").innerHTML = center.lat().toFixed(5);
    document.getElementById("lng").innerHTML = center.lng().toFixed(5);

    GEvent.addListener(marker, "dragend", function(){
      var point = marker.getPoint();
      map.panTo(point);
      document.getElementById("lat").innerHTML = point.lat().toFixed(5);
      document.getElementById("lng").innerHTML = point.lng().toFixed(5);
    }); /*END GEvent.addListener(marker, "dragend", function(){*/

    GEvent.addListener(map, "moveend", function() {
      map.clearOverlays();
      var center = map.getCenter();
      var marker = new GMarker(center, {draggable: true});
      map.addOverlay(marker);
      document.getElementById("lat").innerHTML = center.lat().toFixed(5);
      document.getElementById("lng").innerHTML = center.lng().toFixed(5);

      GEvent.addListener(marker, "dragend", function() {
        var point =marker.getPoint();
        map.panTo(point);
        document.getElementById("lat").innerHTML = point.lat().toFixed(5);
        document.getElementById("lng").innerHTML = point.lng().toFixed(5);
      }); /*END GEvent.addListener(marker, "dragend", function() {*/
    }); /*END GEvent.addListener(map, "moveend", function() {*/
  } /*END if (GBrowserIsCompatible()){*/
} /*END function load*/

第二个使用这个

<script type="text/javascript">
function showAddress() {
  var map = new GMap2(document.getElementById("map"));
  var address = document.getElementById('fullAddress').value;


  return false;
} /*END function showAddress*/ 

var geocoder = new google.maps.Geocoder();

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.');
    }
  });
}

function updateMarkerStatus(str) {
  document.getElementById('markerStatus').innerHTML = str;
}

function updateMarkerPosition(latLng) {
  document.getElementById('info').innerHTML = [
    latLng.lat(),
    latLng.lng()
  ].join(', ');
}

function updateMarkerAddress(str) {
  document.getElementById('address').innerHTML = str;
}

function initialize() {
  var latLng = new google.maps.LatLng(54.18173, -6.35284);
  var map = new google.maps.Map(document.getElementById('mapCanvas'), {
    zoom: 8,
    center: latLng,
    mapTypeId: google.maps.MapTypeId.ROADMAP
  });
  var marker = new google.maps.Marker({
    position: latLng,
    title: 'Point A',
    map: map,
    draggable: true
  });

  // Update current position info.
  updateMarkerPosition(latLng);
  geocodePosition(latLng);

  // Add dragging event listeners.
  google.maps.event.addListener(marker, 'dragstart', function() {
    updateMarkerAddress('Dragging...');
  });

  google.maps.event.addListener(marker, 'drag', function() {
    updateMarkerStatus('Dragging...');
    updateMarkerPosition(marker.getPosition());
  });

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

// Onload handler to fire off the app.
google.maps.event.addDomListener(window, 'load', initialize);
</script>

Answer 1

拖动地图时捕捉事件。获取地图中心更新标记的位置对标记的位置进行地理编码

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

像这样：http://jsfiddle.net/ZYV9N/

使地理编码地图缩放滚动

1 个答案: