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我正在为非营利组织“诺克斯山公园之友”创建交互式地图，但我在使用 Google 地球视图时遇到了问题。

这是项目： http: //www.virtualbc.ca/knoxmountain/

这是与谷歌地图代码相关的代码：

google.load('earth', '1');
var map;
var googleEarth;

var gmarkers = [];

var iconShadow = new google.maps.MarkerImage('icons/shadow.png',
      // The shadow image is larger in the horizontal dimension
      // while the position and offset are the same as for the main image.
new google.maps.Size(46, 42),
new google.maps.Point(0,0),
new google.maps.Point(13, 42));

var sites = [
['1',49.905305,-119.491191, 37, '<img src="images/parking.jpg" />','parking'],
['2',49.905842,-119.481927, 36, '<img src="images/viewpoint.jpg" />','viewpoint'],
['3',49.907366,-119.490439, 35, '<img src="images/shelter.jpg" />','shelter'],
['4',49.907878,-119.491058, 34, '<img src="images/viewpoint.jpg" />','viewpoint'],
['5',49.908405,-119.491083, 33, '<img src="images/parking.jpg" />','parking'],
['6',49.910402,-119.492423, 32, '<img src="images/viewpoint.jpg" />','viewpoint'],
['7',49.911380,-119.480236, 31, '<img src="images/shelter.jpg" />','shelter'],
['9',49.911389,-119.480571, 30, '<img src="images/playground.jpg" />','playground'],
['a',49.911417,-119.485104, 29, '<img src="images/shelter.jpg" />','shelter'],
['b',49.911578,-119.479905, 28, '<img src="images/parking.jpg" />','parking'],
['8',49.911656,-119.480227, 27, '<img src="images/picnic.jpg" />','picnic'],
['c',49.91174271,-119.48507050, 26, '<a href="vtours/apex_trail_shelter/index.html?iframe=true&width=88%&height=98%" rel="prettyPhoto"><img src="images/apex_point_high.jpg" /></a>','icon'],
['d',49.911916,-119.485581, 25, '<img src="images/viewpoint.jpg" />','viewpoint'],
['e',49.912234,-119.485175, 24, '<img src="images/viewpoint.jpg" />','viewpoint'],
['f',49.912662,-119.485008, 23, '<img src="images/viewpoint.jpg" />','viewpoint'],
['g',49.91286999,-119.48413424, 22, '<a href="vtours/apex_trail_1/index.html?iframe=true&width=88%&height=98%" rel="prettyPhoto"><img src="images/apex_point_low.jpg" /></a>','icon'],
['h',49.913207,-119.482843, 21, '<img src="images/parking.jpg" />','parking'],
['i',49.914174,-119.472531, 20, '<img src="images/viewpoint.jpg" />','viewpoint'],
['j',49.914445,-119.482013, 19, '<img src="images/information.jpg" />','information'],
['k',49.914687,-119.482042, 18, '<img src="images/washroom.jpg" />','washroom'],
['l',49.914747,-119.482432, 17, '<img src="images/shelter.jpg" />','shelter'],
['m',49.914814,-119.483070, 16, '<img src="images/viewpoint.jpg" />','viewpoint'],
['n',49.915162,-119.482393, 15, '<img src="images/viewpoint.jpg" />','viewpoint'],
['o',49.916277,-119.481530, 14, '<img src="images/viewpoint.jpg" />','viewpoint'],
['p2',49.919028,-119.479564, 13, '<img src="images/viewpoint.jpg" />','viewpoint'],
['p',49.919065,-119.478622, 12, '<img src="images/viewpoint.jpg" />','viewpoint'],
['q',49.91971281,-119.47954356, 11, '<a href="vtours/gordon_trail_1/index.html?iframe=true&width=88%&height=98%" rel="prettyPhoto"><img src="images/gordon_trail_1.jpg" /></a>','icon'],
['r',49.919778,-119.479044, 10, '<img src="images/viewpoint.jpg" />','viewpoint'],
['s',49.920243,-119.480118, 9, '<img src="images/viewpoint.jpg" />','viewpoint'],
['t',49.922075,-119.481165, 8, '<img src="images/viewpoint.jpg" />','viewpoint'],
['u',49.924514,-119.478223, 7, '<img src="images/swim.jpg" />','swimming'],
['v',49.924599,-119.477396, 6, '<img src="images/washroom.jpg" />','washroom'],
['w',49.924867,-119.477636, 5, '<img src="images/picnic.jpg" />','picnic'],
['x',49.925053,-119.477334, 4, '<img src="images/picnic.jpg" />','picnic'],
['y',49.925211,-119.476506, 3, '<img src="images/picnic.jpg" />','picnic'],
['z',49.925446,-119.476789, 2, '<img src="images/swim.jpg" />','swimming'],
['z2',49.92555541,-119.47710250, 1, '<a href="vtours/paul_tomb_bay_1/index.html?iframe=true&width=88%&height=98%" rel="prettyPhoto"><img src="images/tomb_bay.jpg" /></a>','icon']
];


var infowindow = null;

var overlay;

// Used to make Google Map quard coords to MapCruncher/BingMaps quard coords    
function TileToQuadKey ( x, y, zoom)
{
    var quad = "";
    for (var i = zoom; i > 0; i--)
    {
        var mask = 1 << (i - 1);
        var cell = 0;
        if ((x & mask) != 0)
            cell++;
        if ((y & mask) != 0)
            cell += 2;
        quad += cell;
    }
    return quad;
}

function init() {
    var centerMap = new google.maps.LatLng(49.909671,-119.482241);

    var myOptions = {
        zoom: 10,
        center: centerMap,
        mapTypeId: google.maps.MapTypeId.SATELLITE
    }

    map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

        // Create the tile layers     

    // ASTER Tile Layer  
    myASTEROptions = {
     getTileUrl : function (a,b) { 
return  "http://www.virtualbc.ca/knoxmountain/map/" + TileToQuadKey(a.x,a.y,b) + ".png"; 
},
     isPng: true,
     opacity: 1.0,
     tileSize: new google.maps.Size(256,256),
     name: "ASTER",
     minZoom:13,
     maxZoom:20
     }

    ASTERMapType = new google.maps.ImageMapType( myASTEROptions );
    map.overlayMapTypes.insertAt(0, ASTERMapType);

     // Aerial Tile Layer  
    myAerialOptions = {
     getTileUrl : function (a,b) { 
return  "http://www.virtualbc.ca/knoxmountain/map/" + TileToQuadKey(a.x,a.y,b) + ".png"; 
},
     isPng: true,
     opacity: 1.0,
     tileSize: new google.maps.Size(256,256),
     name: "Aerial",
     minZoom:15,
     maxZoom:21
     }

   AerialMapType = new google.maps.ImageMapType( myAerialOptions );
   map.overlayMapTypes.insertAt(1, AerialMapType);

    var panorama = new google.maps.StreetViewPanorama(map.getDiv()); 
    panorama.setVisible(false); 
    panorama.set('enableCloseButton', true); 
    map.setStreetView(panorama); 
    panorama.setPosition(centerMap); 

    setMarkers(map, sites);     
    setZoom(map, sites);

    infowindow = new google.maps.InfoWindow({
        content: "Loading..."
    });

    googleEarth = new GoogleEarth(map);

    google.maps.event.addListenerOnce(map, 'tilesloaded', addOverlays);

}


/*
This functions sets the markers (array)
*/
function setMarkers(map, markers) {
    for (var i = 0; i < markers.length; i++) {
        var site = markers[i];
        var siteLatLng = new google.maps.LatLng(site[1], site[2]);

        var marker = new google.maps.Marker({
            position: siteLatLng,
            map: map,
            title: site[0],
            zIndex: site[3],
            html: site[4],
            // Markers drop on the map
            animation: google.maps.Animation.DROP,
            icon: 'http://www.virtualbc.ca/knoxmountain/icons/'+site[5]+'.png',
            shadow: iconShadow
        });

        gmarkers.push(marker);

        google.maps.event.addListener(marker, "click", function () {
            infowindow.setContent(this.html);
            infowindow.open(map, this);
        });
    }
}

/*
Set the zoom to fit comfortably all the markers in the map
*/
function setZoom(map, markers) {
    var boundbox = new google.maps.LatLngBounds();
    for ( var i = 0; i < markers.length; i++ )
    {
      boundbox.extend(new google.maps.LatLng(markers[i][1], markers[i][2]));
    }
    map.setCenter(boundbox.getCenter());
    map.fitBounds(boundbox);
}

// This function picks up the click and opens the corresponding info window

function myclick(i) {
    google.maps.event.trigger(gmarkers[i-1], "click");
//  gmarkers[i].setAnimation(null);
//  gmarkers[i-1].setAnimation(google.maps.Animation.BOUNCE);
//  value = i-1;
}

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

问题：

  • 如何使图块在 Google Earth API 中可见？

  • 或者如何仅在 Google 地球选项卡中显示 KML 文件？

  • 只有在选择 Google 地球选项卡时，有什么方法可以运行代码？

提前致谢。

4

1 回答 1

1

有几种方法可以实现您的目标。为了稍微澄清原始问题，此页面使用Google Maps v3 Utility Library 的 GoogleEarth 部分，因此我的回答将利用其功能。

首先，只有在选择 Google Earth 视图时才可以运行代码。如果您在地球视图中，您可以随时通过检查当前的MapTypeId进行测试。实用程序库提供了一个自定义 id，它表明用户正在使用地球视图，如果

map.getMapTypeId() === GoogleEarth.MAP_TYPE_ID

这就是被动测试。要在用户切换到地球地图类型时收到通知，您可以像这样注册一个事件侦听器：

google.maps.event.addListener(map, 'maptypeid_changed', function() {
  if (map.getMapTypeId() === GoogleEarth.MAP_TYPE_ID) {
    // using the Earth plugin, can run custom code
  } else {
    // some other map type (roadmap, satellite, etc)
  }
});

最后，如果您通过 Maps API 添加它们，实用程序库只会在 Maps 和 Earth 之间同步 KML 叠加层。如果您改为将 KML 直接添加到 Earth 插件，它只会显示在 Earth 插件中，而不是在常规地图视图中。为此，您需要一个对实际插件实例的引用，您可以通过以下方式从实用程序库中获取它

var ge = googleEarth.getInstance();

（这是使用您的代码，其中 googleEarth 是您使用实用程序库创建的实例的名称）。此时，您可以像通常使用Earth API一样使用该插件。请参阅此加载 KML 的示例，例如：Fetch Good KML

于 2012-06-20T20:13:35.367 回答