查找我的地理定位Google Maps API V3的最近標記

Question

我有一個腳本顯示我在我的頁面中實現的Google地圖，目前它顯示了雷達搜索生成的一系列標記。 我想我可能已將這些生成的標記放入數組中，但我不知道該怎么做。 我也查了一下“hasrsine formula”，因為這似乎是計算Geolocation和數組中點之間距離的一種方法。 我希望能夠使用標簽Id“#findMe”來執行搜索，因此單擊它將找到我的地理位置的最近標記，然后使用它打印警報。 我在使用google api內置方法時遇到了麻煩，但我想再次將標記放在數組中。

修改后的代碼 - 這是對嗎？Dr.Molle？

    jQuery(function($){

  var $overlay = $('.overlay'),
      resize = true,
      map;
    var service;
    var marker = [];
    var pos;
    var infowindow;
    var placeLoc


function initialize() {
  /*var mapOptions = {
    zoom: 8,
    center: new google.maps.LatLng(-34.397, 150.644),
    mapTypeId: google.maps.MapTypeId.ROADMAP
  };
  map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);

}*/
var mapOptions = {
    zoom: 15
  };
  map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);

  // Try HTML5 geolocation
  if(navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {

            var pos = new google.maps.LatLng(position.coords.latitude,position.coords.longitude);

        var request = {
      location:pos,
      radius:1000,

  };

  infowindow = new google.maps.InfoWindow();
  var service = new google.maps.places.PlacesService(map);
  service.nearbySearch(request,callback);
      pos = new google.maps.LatLng(position.coords.latitude,
                                       position.coords.longitude);


        infowindow = new google.maps.InfoWindow({
        map: map,
        position: pos,
        content: 'You Are Here'
      });
        $('#findMe').data('pos',pos);

      map.setCenter(pos);
    }, function() {
      handleNoGeolocation(true);
    });
  } else {
    // Browser doesn't support Geolocation
    handleNoGeolocation(false);
  }



  function callback(results, status) {
      var markers = [];
  if (status == google.maps.places.PlacesServiceStatus.OK) {
    for (var i = 0; i < results.length; i++) {
      markers.push(createMarker(results[i]));
    }
  }
  $('#findMe').data('markers',markers);
}
}

function createMarker(place) {
  placeLoc = place.geometry.location;
  var marker = new google.maps.Marker({
    map: map,
    position: place.geometry.location,
    icon: {
        path: google.maps.SymbolPath.CIRCLE,
        scale: 8,
        fillColor:'00a14b',
        fillOpacity:0.3,
        fillStroke: '00a14b',       
        strokeWeight:4,
        strokeOpacity: 0.7
    },



  });


  google.maps.event.addListener(marker, 'click', function() {
    infowindow.setContent(place.name);
    infowindow.open(map, this);
  });
  return marker;
}

function handleNoGeolocation(errorFlag) {
  if (errorFlag) {
    var content = 'Error: The Geolocation service failed.';
  } else {
    var content = 'Error: Your browser doesn\'t support geolocation.';
  }

  var options = {
    map: map,
    position: new google.maps.LatLng(60, 105),
    content: content
  };

  var infowindow = new google.maps.InfoWindow(options);
  map.setCenter(options.position);
}

google.maps.event.addDomListener(window, 'load', initialize);

$('#show').click(function(){

    $overlay.show();

  if ( resize ){
    google.maps.event.trigger(map, 'resize');
    resize = false;
  }

});

$('.overlay-bg').click(function(){

    $overlay.hide();

});

$( "#findMe" ).click(function() {

  var pos     = $(this).data('pos'),
      markers = $(this).data('markers'),
      closest;

  if(!pos || !markers){
    return;
  }

  $.each(markers,function(){
    var distance=google.maps.geometry.spherical
                  .computeDistanceBetween(this.getPosition(),pos);
    if(!closest || closest.distance > distance){
      closest={marker:this,
               distance:distance}
    }
  });
  if(closest){
    //closest.marker will be the nearest marker, do something with it
    //here we simply trigger a click, which will open the InfoWindow 
    google.maps.event.trigger(closest.marker,'click')
  }
});


});

Answer 1

使用以下標記填充數組：

1. 讓createMarker函數返回標記，在函數末尾添加：

    return marker; 

2. 存儲數組（例如，作為#findMe的data-property）

    function callback(results, status) { var markers=[]; if (status == google.maps.places.PlacesServiceStatus.OK) { for (var i = 0; i < results.length; i++) { markers.push(createMarker(results[i])); } } $('#findMe').data('markers',markers); } 

還存儲地理位置返回的位置（例如也作為#findMe的數據）：

  //add this after defining pos in the success-callback of geolocation
  $('#findMe').data('pos',pos);

要查找最近的標記，您可以使用geometry-library的方法computeDistanceBetween -method（不要忘記加載庫，默認情況下不加載它）

$( "#findMe" ).click(function() {

  var pos     = $(this).data('pos'),
      markers = $(this).data('markers'),
      closest;

  if(!pos || !markers){
    return;
  }

  $.each(markers,function(){
    var distance=google.maps.geometry.spherical
                  .computeDistanceBetween(this.getPosition(),pos);
    if(!closest || closest.distance > distance){
      closest={marker:this,
               distance:distance}
    }
  });
  if(closest){
    //closest.marker will be the nearest marker, do something with it
    //here we simply trigger a click, which will open the InfoWindow 
    google.maps.event.trigger(closest.marker,'click')
  }
});