9

我有这个脚本可以在谷歌地图上显示自定义标记，但我想包含一个输入文本框，并能够输入一个城市/州和一个邮政编码，看看里面是否有任何标记让我们说 400距离该城市/州或邮政编码英里。如果地图可以是动态的，我会喜欢它，这样当您输入城市/州或邮政编码时，它将通过删除所有其他标记并仅留下该半径内的标记，在地图上显示结果，如果这太难了，那么一个简单的改变框说什么单位是最接近的也可以:)我搜索并发现有人说我应该加载几何库并使用它computeDistanceBetween()来查找每个标记与中心点的距离，但我不知道如何做邮政编码部分或如何将所有这些放在一起工作。

这是我的代码：

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title></title>
<script type="text/javascript"  src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" src="http://google-maps-utility-library-v3.googlecode.com/svn/trunk/markerclustererplus/src/markerclusterer.js"></script>

<script type="text/javascript"> 
   var image = new google.maps.MarkerImage("marker-images/image.png",new google.maps.Size(40,35),new google.maps.Point(0,0),new google.maps.Point(20,35));

   var shadow = new google.maps.MarkerImage(
                            'marker-images/shadow.png',
                            new google.maps.Size(62,35),
                            new google.maps.Point(0,0),
                            new google.maps.Point(20,35)
                          );

   var shape = {
                coord: [27,0,30,1,32,2,34,3,35,4,36,5,38,6,39,7,39,8,39,9,39,10,38,11,37,12,33,13,34,14,34,15,33,16,32,17,31,18,27,19,28,20,28,21,27,22,26,23,22,25,23,26,24,27,24,28,24,29,24,30,24,31,24,32,23,33,22,34,17,34,16,33,15,32,15,31,14,30,14,29,15,28,15,27,16,26,17,25,13,23,12,22,11,21,11,20,12,19,8,18,7,17,6,16,5,15,5,14,6,13,2,12,1,11,0,10,0,9,0,8,0,7,1,6,3,5,4,4,5,3,7,2,9,1,12,0,27,0],
                type: 'poly'
          };

     // this variable will collect the html which will eventually be placed in the side_bar 
     var side_bar_html = ""; 

     // arrays to hold copies of the markers and html used by the side_bar 
     // because the function closure trick doesnt work there 
     var gmarkers = []; 

     // global "map" variable
     var map = null;
     var circle = null;

     //marker clusterer
     var mc;
     var mcOptions = {gridSize: 10, maxZoom: 8};

     //global infowindow
     var infowindow = new google.maps.InfoWindow();

     //geocoder
     var geocoder = new google.maps.Geocoder(); 
     var address = new Array("41.8119,-87.6873",
                        "40.7888,-74.056",
                        "41.8119,-87.6873",
                        "48.6681,-97.3627",
                        "44.9793,-93.273",
                        "39.4857,-75.6775",
                        "41.8119,-87.6873",
                        "42.0203,-87.9059",
                        "32.7812,-96.7903",
                        "27.5159,-99.4941",
                        "32.7812,-96.7903",
                        "37.5608,-95.6684",
                        "41.8119,-87.6873",
                        "38.3763,-97.6702",
                        "42.2458,-83.2491",
                        "41.8122,-91.9139",
                        "41.8397,-88.0887",
                        "41.8397,-88.0887",
                        "38.5128,-122.787",
                        "41.8397,-88.0887",
                        "42.8863,-87.892",
                        "42.8863,-87.892",
                        "30.7539,-83.3321",
                        "39.889,-84.2422",
                        "34.106,-83.589");
     var content = new Array("Unit No# 0206",
                        "Unit No# #2003",
                        "Unit No# 0176",
                        "Unit No# #2001",
                        "Unit No# 0124",
                        "Unit No# 0157",
                        "Unit No# #0162",
                        "Unit No# 0104",
                        "Unit No# 0118",
                        "Unit No# #2007",
                        "Unit No# 0112",
                        "Unit No# 0139",
                        "Unit No# 0205",
                        "Unit No# 0127",
                        "Unit No# 0187",
                        "Unit No# 0105",
                        "Unit No# 0214",
                        "Unit No# 0186",
                        "Unit No# 0173",
                        "Unit No# 0134",
                        "Unit No# 0128",
                        "Unit No# 0125",
                        "Unit No# 0158",
                        "Unit No# 0193",
                        "Unit No# 0201");

     //min and max limits for multiplier, for random numbers
     //keep the range pretty small, so markers are kept close by
     var min = .999999;
            var max = 1.000001;

    function createMarker(latlng,text) {
      var marker = new google.maps.Marker({
         draggable: false,
         raiseOnDrag: false,
         icon: image,
         shadow: shadow,
         shape: shape,
         position: latlng,
         map: map
       });

     ///get array of markers currently in cluster
     var allMarkers = mc.getMarkers();

     //check to see if any of the existing markers match the latlng of the new marker
      if (allMarkers.length != 0) {
        for (i=0; i < allMarkers.length; i++) {
          var existingMarker = allMarkers[i];
          var pos = existingMarker.getPosition();

          if (latlng.equals(pos)) {
            text = text + " & " + content[i];
          }                   
        }
      }

      google.maps.event.addListener(marker, 'click', function() {
        infowindow.close();
        infowindow.setContent(text);
        infowindow.open(map,marker);
      });
      mc.addMarker(marker);
      return marker;
    }
    function initialize(){
        var options = { 
            zoom: 4, 
            center: new google.maps.LatLng(39.8282,-98.5795), 
            mapTypeId: google.maps.MapTypeId.ROADMAP 
        };
        map = new google.maps.Map(document.getElementById('map'), options); 

    //marker cluster
        var gmarkers = [];
        mc = new MarkerClusterer(map, [], mcOptions);
        for (i=0; i<address.length; i++) {
           var ptStr = address[i];
           var coords = ptStr.split(",");
           var latlng = new google.maps.LatLng(parseFloat(coords[0]),parseFloat(coords[1]));
           gmarkers.push(createMarker(latlng,content[i]));
        }
    }

          function codeAddress() {
            var address = document.getElementById('address').value;
            var radius = parseInt(document.getElementById('radius').value, 10) * 1609.34;
            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,  <-- uncomment to show red marker
                    position: results[0].geometry.location
                });
                if (circle) circle.setMap(null);
                circle = new google.maps.Circle({center:marker.getPosition(),
                                                 radius: radius,
                                                 fillOpacity: 0.35,
                                                 fillColor: "#FF0000",
                                                 map: map});
                var bounds = new google.maps.LatLngBounds();
            var foundMarkers = 0;
                for (var i=0; i<gmarkers.length;i++) {
                  if (google.maps.geometry.spherical.computeDistanceBetween(gmarkers[i].getPosition(),marker.getPosition()) < radius) {
                    bounds.extend(gmarkers[i].getPosition())
                    gmarkers[i].setMap(map);
            foundMarkers++;
                  } else {
                    gmarkers[i].setMap(null);
                  }
                }
                if (foundMarkers > 0) {
                  map.fitBounds(bounds);
            } else {
                  map.fitBounds(circle.getBounds());
                }
              } else {
                alert(status);
              }
            });
          }

    var infowindow = new google.maps.InfoWindow(
      { 
        size: new google.maps.Size(150,50)
      });


    function handleKeyPress(e){
     var key=e.keyCode || e.which;
      if (key==13){
         codeAddress();
      }
    }

    function handleResetKeyPress(e){
        if (map.getZoom() != 4) map.setZoom(4);
          map.setCenter(new google.maps.LatLng(39.8282, -98.5795));
        document.getElementById("address").value = 'Enter City,State or Zipcode';
        document.getElementById("radius").value = '200';
    }
    </script> 

    <style>
    html, body, #map {
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
    }
    .auto-style1 {
        text-align: center;
    }
      #footer {
        position : absolute;
        bottom : 0;
        height : 40px;
        margin-top : 40px;
     /* border: 1px solid blue; */
      }
    </style>
    </head>
    <body onload='initialize()'>
    <div id="map"></div>
    <div id="footer" class="auto-style1" style="left: 0px; bottom: 0; width: 100%">
          <input type="text" id="address" value="Enter City,State or Zipcode" onclick="if(this.value=='Enter City,State or Zipcode'){this.value=''}" onblur="if(this.value==''){this.value='Enter City,State or Zipcode'}" onkeypress="handleKeyPress(event);" style="width: 183px">
          <input type="button" value="Search" onclick="codeAddress();">
          <input type="button" value="Reset" onclick="handleResetKeyPress();">
          <input type="text" id="radius" value="200" style="width: 42px" onclick="if(this.value=='200'){this.value=''}" onblur="if(this.value==''){this.value='200'}" onkeypress="handleKeyPress(event);"> miles
    </div>
    </body>
</html>
4

2 回答 2

9

这是一个工作示例。

该示例使用all_locations- 示例位置数组。

您可以将其替换为您的位置（例如，您从数据库中获取的位置）。您可以在输入栏中插入任何地址，例如“123 New Street, New York, 56789, NY”，然后使用google.maps.Geocoder代码将该地图地理编码到 LatLng 位置，在该位置周围绘制一个半径。只有地址周围半径范围内的位置才会显示在地图上。要查看示例位置，请输入“纽约第二街”作为地址。

var map = null;
  var radius_circle;
  var markers_on_map = [];
  var geocoder;
  var infowindow;
  
  //all_locations is just a sample, you will probably load those from database
  var all_locations = [
	  {type: "Restaurant", name: "Restaurant 1", lat: 40.723080, lng: -73.984340},
	  {type: "School", name: "School 1", lat: 40.724705, lng: -73.986611},
	  {type: "School", name: "School 2", lat: 40.724165, lng: -73.983883},
	  {type: "Restaurant", name: "Restaurant 2", lat: 40.721819, lng: -73.991358},
	  {type: "School", name: "School 3", lat: 40.732056, lng: -73.998683}
  ];

  //initialize map on document ready
  $(document).ready(function(){
      var latlng = new google.maps.LatLng(40.723080, -73.984340); //you can use any location as center on map startup
      var myOptions = {
        zoom: 1,
        center: latlng,
        mapTypeControl: true,
        mapTypeControlOptions: {style: google.maps.MapTypeControlStyle.DROPDOWN_MENU},
        navigationControl: true,
        mapTypeId: google.maps.MapTypeId.ROADMAP
      };
      map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
	  geocoder = new google.maps.Geocoder();
      google.maps.event.addListener(map, 'click', function(){
           if(infowindow){
             infowindow.setMap(null);
             infowindow = null;
           }
      });
  });
  
  function showCloseLocations() {
  	var i;
  	var radius_km = $('#radius_km').val();
  	var address = $('#address').val();

  	//remove all radii and markers from map before displaying new ones
  	if (radius_circle) {
  		radius_circle.setMap(null);
  		radius_circle = null;
  	}
  	for (i = 0; i < markers_on_map.length; i++) {
  		if (markers_on_map[i]) {
  			markers_on_map[i].setMap(null);
  			markers_on_map[i] = null;
  		}
  	}

  	if (geocoder) {
  		geocoder.geocode({'address': address}, function (results, status) {
  			if (status == google.maps.GeocoderStatus.OK) {
  				if (status != google.maps.GeocoderStatus.ZERO_RESULTS) {
  					var address_lat_lng = results[0].geometry.location;
  					radius_circle = new google.maps.Circle({
  						center: address_lat_lng,
  						radius: radius_km * 1000,
  						clickable: false,
						map: map
  					});
                    if (radius_circle) map.fitBounds(radius_circle.getBounds());
  					for (var j = 0; j < all_locations.length; j++) {
  						(function (location) {
  							var marker_lat_lng = new google.maps.LatLng(location.lat, location.lng);
  							var distance_from_location = google.maps.geometry.spherical.computeDistanceBetween(address_lat_lng, marker_lat_lng); //distance in meters between your location and the marker
  							if (distance_from_location <= radius_km * 1000) {
  								var new_marker = new google.maps.Marker({
  									position: marker_lat_lng,
  									map: map,
  									title: location.name
  								});      								google.maps.event.addListener(new_marker, 'click', function () {
                                    if(infowindow){
             infowindow.setMap(null);
             infowindow = null;
           }
  									infowindow = new google.maps.InfoWindow(
            { content: '<div style="color:red">'+location.name +'</div>' + " is " + distance_from_location + " meters from my location",
              size: new google.maps.Size(150,50),
              pixelOffset: new google.maps.Size(0, -30)
            , position: marker_lat_lng, map: map});
  								});
  								markers_on_map.push(new_marker);
  							}
  						})(all_locations[j]);
  					}
  				} else {
  					alert("No results found while geocoding!");
  				}
  			} else {
  				alert("Geocode was not successful: " + status);
  			}
  		});
  	}
  }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript">
        google.load("maps", "3",{other_params:"sensor=false&libraries=geometry"});
      </script>

<body style="margin:0px; padding:0px;" >
 <input id="address" value="Second Steet, New York" placeholder="Input Address"/>
 <select id="radius_km">
	 <option value=1>1km</option>
	 <option value=2>2km</option>
	 <option value=5>5km</option>
	 <option value=30>30km</option>
 </select>
 <button onClick="showCloseLocations()">Show Locations In Radius</button>
 <div id="map_canvas"  style="width:500px; height:300px;">
</body>
</html>

于 2016-05-07T12:37:39.313 回答
4

这是一个示例，说明如何使用地理编码 API 和一些简单的几何图形来解决这个问题。

（请注意，为简洁起见，我对地址和半径进行了硬编码。） 

// we assume that you have an array of markers
var markers = [];

//In order to lookup the the position of a zip-code you can use the geocoding API:
// https://developers.google.com/maps/documentation/geocoding/
var geocode_api_base_url = "http://maps.googleapis.com/maps/api/geocode/json?";
var params = {
    adress : 05673,
    components : "country:us",
    sensor : false
}
// This is the result set of markers in area
var in_area = [];

//  http://maps.googleapis.com/maps/api/geocode/json?address=05673&components=country:US&sensor=false
$.getJSON( geocode_api_base_url + $.param(params), function(data) {

    var location, search_area, in_area = [];

    location = data['results'][0]['address_components']['geometry']['location'];

    // We create a circle to look within:
    search_area = {
        strokeColor: '#FF0000',
        strokeOpacity: 0.8,
        strokeWeight: 2,
        center : new google.maps.LatLng(location.lat, location.lon),
        radius : 500
    }

    search_area = new google.maps.Circle(search_area);

    $.each(markers, function(i,marker) {
       if (google.maps.geometry.poly.containsLocation(marker.getPosition(), search_area)) {
         in_area.push(marker);
       }
    });

    console.info(in_area);

});
于 2013-12-04T12:18:16.847 回答