在Google熱圖中的數據切換

想知道是否有一種簡單的方法在Google地圖上使用熱圖層切換2組或更多組數據變量？在Google熱圖中的數據切換

的典型例子：

var taxiData = [ 
new google.maps.LatLng(37.782551, -122.445368), 
new google.maps.LatLng(37.782745, -122.444586), ... 
]; 

pointArray = new google.maps.MVCArray(taxiData); 
heatmap = new google.maps.visualization.HeatmapLayer({ 
data: pointArray 
}); 
heatmap.setMap(map);

但是，如果我想有一個vartaxiDataJan，vartaxiDataFeb和2之間切換呢？我想創建一個切換按鈕，然後在兩個月之間在數據集之間切換。

我看着下面：Updating heatmap data, simple google HeatMap

但這只不過是增加了一個新的記錄到陣列的底部，而我要更換整個陣列提前

謝謝！

來源

2013-05-31 user2438546

似乎一次只能有一個HeatMapLayer對象。這個工作對我來說：

function toggleHeatmap() { 
    if (firstData) { 
    heatmap.setData(pointArray2); 
    firstData=false; 
    } else { 
    heatmap.setData(pointArray); 
    firstData=true; 
    } 
}

working example

代碼片段：

function initialize() { 
 
    var mapOptions = { 
 
    zoom: 10, 
 
    center: new google.maps.LatLng(37.774546, -122.433523), 
 
    mapTypeId: google.maps.MapTypeId.SATELLITE 
 
    }; 
 

 
    map = new google.maps.Map(document.getElementById('map-canvas'), 
 
    mapOptions); 
 

 
    pointArray = new google.maps.MVCArray(taxiData); 
 
    pointArray2 = new google.maps.MVCArray(taxiData2); 
 

 
    heatmap = new google.maps.visualization.HeatmapLayer({ 
 
    data: pointArray 
 
    }) 
 

 
    heatmap.setMap(map); 
 
    // heatmap2.setMap(map); 
 
} 
 

 
function toggleHeatmap() { 
 
    if (firstData) { 
 
    heatmap.setData(pointArray2); 
 
    firstData = false; 
 
    } else { 
 
    heatmap.setData(pointArray); 
 
    firstData = true; 
 
    } 
 
} 
 

 
function changeGradient() { 
 
    var gradient = [ 
 
    'rgba(0, 255, 255, 0)', 
 
    'rgba(0, 255, 255, 1)', 
 
    'rgba(0, 191, 255, 1)', 
 
    'rgba(0, 127, 255, 1)', 
 
    'rgba(0, 63, 255, 1)', 
 
    'rgba(0, 0, 255, 1)', 
 
    'rgba(0, 0, 223, 1)', 
 
    'rgba(0, 0, 191, 1)', 
 
    'rgba(0, 0, 159, 1)', 
 
    'rgba(0, 0, 127, 1)', 
 
    'rgba(63, 0, 91, 1)', 
 
    'rgba(127, 0, 63, 1)', 
 
    'rgba(191, 0, 31, 1)', 
 
    'rgba(255, 0, 0, 1)' 
 
    ] 
 
    heatmap.setOptions({ 
 
    gradient: heatmap.get('gradient') ? null : gradient 
 
    }); 
 
} 
 

 
function changeRadius() { 
 
    heatmap.setOptions({ 
 
    radius: heatmap.get('radius') ? null : 20 
 
    }); 
 
} 
 

 
function changeOpacity() { 
 
    heatmap.setOptions({ 
 
    opacity: heatmap.get('opacity') ? null : 0.2 
 
    }); 
 
} 
 

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

 
// Adding 500 Data Points 
 
var map = null; 
 
var heatmap = null; 
 
var heatmap2 = null; 
 
var pointArray = null; 
 
var pointArray2 = null; 
 
var firstData = true; 
 
var taxiData = [ 
 
    new google.maps.LatLng(37.782551, -122.445368), 
 
    new google.maps.LatLng(37.782745, -122.444586), 
 
    new google.maps.LatLng(37.782842, -122.443688), 
 
    new google.maps.LatLng(37.782919, -122.442815), 
 
    new google.maps.LatLng(37.782992, -122.442112), 
 
    new google.maps.LatLng(37.783100, -122.441461), 
 
    new google.maps.LatLng(37.783206, -122.440829), 
 
    new google.maps.LatLng(37.783273, -122.440324), 
 
    new google.maps.LatLng(37.783316, -122.440023), 
 
    new google.maps.LatLng(37.783357, -122.439794), 
 
    new google.maps.LatLng(37.783371, -122.439687), 
 
    new google.maps.LatLng(37.783368, -122.439666), 
 
    new google.maps.LatLng(37.783383, -122.439594), 
 
    new google.maps.LatLng(37.783508, -122.439525), 
 
    new google.maps.LatLng(37.783842, -122.439591), 
 
    new google.maps.LatLng(37.784147, -122.439668), 
 
    new google.maps.LatLng(37.784206, -122.439686), 
 
    new google.maps.LatLng(37.784386, -122.439790), 
 
    new google.maps.LatLng(37.784701, -122.439902), 
 
    new google.maps.LatLng(37.784965, -122.439938), 
 
    new google.maps.LatLng(37.785010, -122.439947), 
 
    new google.maps.LatLng(37.785360, -122.439952), 
 
    new google.maps.LatLng(37.785715, -122.440030), 
 
    new google.maps.LatLng(37.786117, -122.440119), 
 
    new google.maps.LatLng(37.786564, -122.440209), 
 
    new google.maps.LatLng(37.786905, -122.440270), 
 
    new google.maps.LatLng(37.786956, -122.440279), 
 
    new google.maps.LatLng(37.800224, -122.433520), 
 
    new google.maps.LatLng(37.800155, -122.434101), 
 
    new google.maps.LatLng(37.800160, -122.434430), 
 
    new google.maps.LatLng(37.800378, -122.434527), 
 
    new google.maps.LatLng(37.800738, -122.434598), 
 
    new google.maps.LatLng(37.800938, -122.434650), 
 
    new google.maps.LatLng(37.801024, -122.434889), 
 
    new google.maps.LatLng(37.800955, -122.435392), 
 
    new google.maps.LatLng(37.800886, -122.435959), 
 
    new google.maps.LatLng(37.800811, -122.436275), 
 
    new google.maps.LatLng(37.800788, -122.436299), 
 
    new google.maps.LatLng(37.800719, -122.436302), 
 
    new google.maps.LatLng(37.800702, -122.436298), 
 
    new google.maps.LatLng(37.800661, -122.436273), 
 
    new google.maps.LatLng(37.800395, -122.436172), 
 
    new google.maps.LatLng(37.800228, -122.436116), 
 
    new google.maps.LatLng(37.800169, -122.436130), 
 
    new google.maps.LatLng(37.800066, -122.436167), 
 
    new google.maps.LatLng(37.784345, -122.422922), 
 
    new google.maps.LatLng(37.784389, -122.422926), 
 
    new google.maps.LatLng(37.784437, -122.422924), 
 
    new google.maps.LatLng(37.784746, -122.422818), 
 
    new google.maps.LatLng(37.785436, -122.422959), 
 
    new google.maps.LatLng(37.786120, -122.423112), 
 
    new google.maps.LatLng(37.786433, -122.423029), 
 
    new google.maps.LatLng(37.786631, -122.421213), 
 
    new google.maps.LatLng(37.786660, -122.421033), 
 
    new google.maps.LatLng(37.786801, -122.420141), 
 
    new google.maps.LatLng(37.786823, -122.420034), 
 
    new google.maps.LatLng(37.786831, -122.419916), 
 
    new google.maps.LatLng(37.787034, -122.418208), 
 
    new google.maps.LatLng(37.787056, -122.418034), 
 
    new google.maps.LatLng(37.787169, -122.417145), 
 
    new google.maps.LatLng(37.787217, -122.416715), 
 
    new google.maps.LatLng(37.786144, -122.416403), 
 
    new google.maps.LatLng(37.785292, -122.416257), 
 
    new google.maps.LatLng(37.780666, -122.390374), 
 
    new google.maps.LatLng(37.780501, -122.391281), 
 
    new google.maps.LatLng(37.780148, -122.392052), 
 
    new google.maps.LatLng(37.780173, -122.391148), 
 
    new google.maps.LatLng(37.780693, -122.390592), 
 
    new google.maps.LatLng(37.781261, -122.391142), 
 
    new google.maps.LatLng(37.781808, -122.391730), 
 
    new google.maps.LatLng(37.782340, -122.392341), 
 
    new google.maps.LatLng(37.782812, -122.393022), 
 
    new google.maps.LatLng(37.783300, -122.393672), 
 
    new google.maps.LatLng(37.783809, -122.394275), 
 
    new google.maps.LatLng(37.784246, -122.394979), 
 
    new google.maps.LatLng(37.784791, -122.395958), 
 
    new google.maps.LatLng(37.785675, -122.396746), 
 
    new google.maps.LatLng(37.786262, -122.395780), 
 
    new google.maps.LatLng(37.786776, -122.395093), 
 
    new google.maps.LatLng(37.787282, -122.394426), 
 
    new google.maps.LatLng(37.787783, -122.393767), 
 
    new google.maps.LatLng(37.788343, -122.393184), 
 
    new google.maps.LatLng(37.788895, -122.392506), 
 
    new google.maps.LatLng(37.789371, -122.391701), 
 
    new google.maps.LatLng(37.789722, -122.390952), 
 
    new google.maps.LatLng(37.790315, -122.390305), 
 
    new google.maps.LatLng(37.790738, -122.389616), 
 
    new google.maps.LatLng(37.779448, -122.438702), 
 
    new google.maps.LatLng(37.779023, -122.438585), 
 
    new google.maps.LatLng(37.768244, -122.428138), 
 
    new google.maps.LatLng(37.767942, -122.428581), 
 
    new google.maps.LatLng(37.767482, -122.429094), 
 
    new google.maps.LatLng(37.767031, -122.429606), 
 
    new google.maps.LatLng(37.766732, -122.429986), 
 
    new google.maps.LatLng(37.766680, -122.430058), 
 
    new google.maps.LatLng(37.766633, -122.430109), 
 
    new google.maps.LatLng(37.766580, -122.430211), 
 
    new google.maps.LatLng(37.766367, -122.430594), 
 
    new google.maps.LatLng(37.765910, -122.431137), 
 
    new google.maps.LatLng(37.765353, -122.431806), 
 
    new google.maps.LatLng(37.764962, -122.432298), 
 
    new google.maps.LatLng(37.764868, -122.432486), 
 
    new google.maps.LatLng(37.764518, -122.432913), 
 
    new google.maps.LatLng(37.763435, -122.434173), 
 
    new google.maps.LatLng(37.762847, -122.434953), 
 
    new google.maps.LatLng(37.762291, -122.435935), 
 
    new google.maps.LatLng(37.762224, -122.436074), 
 
    new google.maps.LatLng(37.761957, -122.436892), 
 
    new google.maps.LatLng(37.761652, -122.438886), 
 
    new google.maps.LatLng(37.761284, -122.439955), 
 
    new google.maps.LatLng(37.761210, -122.440068), 
 
    new google.maps.LatLng(37.761064, -122.440720), 
 
    new google.maps.LatLng(37.761040, -122.441411), 
 
    new google.maps.LatLng(37.761048, -122.442324), 
 
    new google.maps.LatLng(37.760851, -122.443118), 
 
    new google.maps.LatLng(37.759977, -122.444591), 
 
    new google.maps.LatLng(37.759913, -122.444698), 
 
    new google.maps.LatLng(37.759623, -122.445065), 
 
    new google.maps.LatLng(37.758902, -122.445158), 
 
    new google.maps.LatLng(37.758428, -122.444570), 
 
    new google.maps.LatLng(37.757687, -122.443340), 
 
    new google.maps.LatLng(37.757583, -122.443240), 
 
    new google.maps.LatLng(37.757019, -122.442787), 
 
    new google.maps.LatLng(37.756603, -122.442322), 
 
    new google.maps.LatLng(37.756380, -122.441602), 
 
    new google.maps.LatLng(37.755790, -122.441382), 
 
    new google.maps.LatLng(37.754493, -122.442133), 
 
    new google.maps.LatLng(37.754361, -122.442206), 
 
    new google.maps.LatLng(37.753719, -122.442650), 
 
    new google.maps.LatLng(37.753096, -122.442915), 
 
    new google.maps.LatLng(37.751617, -122.443211), 
 
    new google.maps.LatLng(37.751496, -122.443246), 
 
    new google.maps.LatLng(37.750733, -122.443428), 
 
    new google.maps.LatLng(37.750126, -122.443536), 
 
    new google.maps.LatLng(37.750103, -122.443784), 
 
    new google.maps.LatLng(37.750390, -122.444010), 
 
    new google.maps.LatLng(37.750448, -122.444013), 
 
    new google.maps.LatLng(37.750536, -122.444040), 
 
    new google.maps.LatLng(37.750493, -122.444141), 
 
    new google.maps.LatLng(37.790859, -122.402808), 
 
    new google.maps.LatLng(37.790864, -122.402768), 
 
    new google.maps.LatLng(37.790995, -122.402539), 
 
    new google.maps.LatLng(37.791148, -122.402172), 
 
    new google.maps.LatLng(37.791385, -122.401312), 
 
    new google.maps.LatLng(37.791405, -122.400776), 
 
    new google.maps.LatLng(37.791288, -122.400528), 
 
    new google.maps.LatLng(37.791113, -122.400441), 
 
    new google.maps.LatLng(37.791027, -122.400395), 
 
    new google.maps.LatLng(37.791094, -122.400311), 
 
    new google.maps.LatLng(37.791211, -122.400183), 
 
    new google.maps.LatLng(37.791060, -122.399334), 
 
    new google.maps.LatLng(37.790538, -122.398718), 
 
    new google.maps.LatLng(37.790095, -122.398086), 
 
    new google.maps.LatLng(37.789644, -122.397360), 
 
    new google.maps.LatLng(37.789254, -122.396844), 
 
    new google.maps.LatLng(37.788855, -122.396397), 
 
    new google.maps.LatLng(37.788483, -122.395963), 
 
    new google.maps.LatLng(37.788015, -122.395365), 
 
    new google.maps.LatLng(37.787558, -122.394735), 
 
    new google.maps.LatLng(37.787472, -122.394323), 
 
    new google.maps.LatLng(37.787630, -122.394025), 
 
    new google.maps.LatLng(37.787767, -122.393987), 
 
    new google.maps.LatLng(37.787486, -122.394452), 
 
    new google.maps.LatLng(37.786977, -122.395043), 
 
    new google.maps.LatLng(37.786583, -122.395552), 
 
    new google.maps.LatLng(37.786540, -122.395610), 
 
    new google.maps.LatLng(37.786516, -122.395659), 
 
    new google.maps.LatLng(37.786378, -122.395707), 
 
    new google.maps.LatLng(37.786044, -122.395362), 
 
    new google.maps.LatLng(37.785598, -122.394715), 
 
    new google.maps.LatLng(37.785321, -122.394361), 
 
    new google.maps.LatLng(37.785207, -122.394236), 
 
    new google.maps.LatLng(37.785751, -122.394062), 
 
    new google.maps.LatLng(37.785996, -122.393881), 
 
    new google.maps.LatLng(37.786092, -122.393830), 
 
    new google.maps.LatLng(37.785998, -122.393899), 
 
    new google.maps.LatLng(37.785114, -122.394365), 
 
    new google.maps.LatLng(37.785022, -122.394441), 
 
    new google.maps.LatLng(37.784823, -122.394635), 
 
    new google.maps.LatLng(37.784719, -122.394629), 
 
    new google.maps.LatLng(37.785069, -122.394176), 
 
    new google.maps.LatLng(37.785500, -122.393650), 
 
    new google.maps.LatLng(37.785770, -122.393291), 
 
    new google.maps.LatLng(37.785839, -122.393159), 
 
    new google.maps.LatLng(37.782651, -122.400628), 
 
    new google.maps.LatLng(37.782616, -122.400599), 
 
    new google.maps.LatLng(37.782702, -122.400470), 
 
    new google.maps.LatLng(37.782915, -122.400192), 
 
    new google.maps.LatLng(37.783137, -122.399887), 
 
    new google.maps.LatLng(37.783414, -122.399519), 
 
    new google.maps.LatLng(37.783629, -122.399237), 
 
    new google.maps.LatLng(37.783688, -122.399157), 
 
    new google.maps.LatLng(37.783716, -122.399106), 
 
    new google.maps.LatLng(37.783798, -122.399072), 
 
    new google.maps.LatLng(37.783997, -122.399186), 
 
    new google.maps.LatLng(37.784271, -122.399538), 
 
    new google.maps.LatLng(37.784577, -122.399948), 
 
    new google.maps.LatLng(37.784828, -122.400260), 
 
    new google.maps.LatLng(37.784999, -122.400477), 
 
    new google.maps.LatLng(37.785113, -122.400651), 
 
    new google.maps.LatLng(37.785155, -122.400703), 
 
    new google.maps.LatLng(37.785192, -122.400749), 
 
    new google.maps.LatLng(37.785278, -122.400839), 
 
    new google.maps.LatLng(37.785387, -122.400857), 
 
    new google.maps.LatLng(37.785478, -122.400890), 
 
    new google.maps.LatLng(37.785526, -122.401022), 
 
    new google.maps.LatLng(37.785598, -122.401148), 
 
    new google.maps.LatLng(37.785631, -122.401202), 
 
    new google.maps.LatLng(37.785660, -122.401267), 
 
    new google.maps.LatLng(37.803986, -122.426035), 
 
    new google.maps.LatLng(37.804102, -122.425089), 
 
    new google.maps.LatLng(37.804211, -122.424156), 
 
    new google.maps.LatLng(37.803861, -122.423385), 
 
    new google.maps.LatLng(37.803151, -122.423214), 
 
    new google.maps.LatLng(37.802439, -122.423077), 
 
    new google.maps.LatLng(37.801740, -122.422905), 
 
    new google.maps.LatLng(37.801069, -122.422785), 
 
    new google.maps.LatLng(37.800345, -122.422649), 
 
    new google.maps.LatLng(37.799633, -122.422603), 
 
    new google.maps.LatLng(37.799750, -122.421700), 
 
    new google.maps.LatLng(37.799885, -122.420854), 
 
    new google.maps.LatLng(37.799209, -122.420607), 
 
    new google.maps.LatLng(37.795656, -122.400395), 
 
    new google.maps.LatLng(37.795203, -122.400304), 
 
    new google.maps.LatLng(37.778738, -122.415584), 
 
    new google.maps.LatLng(37.778812, -122.415189), 
 
    new google.maps.LatLng(37.778824, -122.415092), 
 
    new google.maps.LatLng(37.778833, -122.414932), 
 
    new google.maps.LatLng(37.778834, -122.414898), 
 
    new google.maps.LatLng(37.778740, -122.414757), 
 
    new google.maps.LatLng(37.778501, -122.414433), 
 
    new google.maps.LatLng(37.778182, -122.414026), 
 
    new google.maps.LatLng(37.777851, -122.413623), 
 
    new google.maps.LatLng(37.777486, -122.413166), 
 
    new google.maps.LatLng(37.777109, -122.412674), 
 
    new google.maps.LatLng(37.776743, -122.412186), 
 
    new google.maps.LatLng(37.776440, -122.411800), 
 
    new google.maps.LatLng(37.776295, -122.411614), 
 
    new google.maps.LatLng(37.776158, -122.411440), 
 
    new google.maps.LatLng(37.775806, -122.410997), 
 
    new google.maps.LatLng(37.775422, -122.410484), 
 
    new google.maps.LatLng(37.775126, -122.410087), 
 
    new google.maps.LatLng(37.775012, -122.409854), 
 
    new google.maps.LatLng(37.775164, -122.409573), 
 
    new google.maps.LatLng(37.775498, -122.409180), 
 
    new google.maps.LatLng(37.775868, -122.408730), 
 
    new google.maps.LatLng(37.776256, -122.408240), 
 
    new google.maps.LatLng(37.776519, -122.407928), 
 
    new google.maps.LatLng(37.776539, -122.407904), 
 
    new google.maps.LatLng(37.776595, -122.407854), 
 
    new google.maps.LatLng(37.776853, -122.407547), 
 
    new google.maps.LatLng(37.777234, -122.407087), 
 
    new google.maps.LatLng(37.777644, -122.406558), 
 
    new google.maps.LatLng(37.778066, -122.406017), 
 
    new google.maps.LatLng(37.778468, -122.405499), 
 
    new google.maps.LatLng(37.778866, -122.404995), 
 
    new google.maps.LatLng(37.779295, -122.404455), 
 
    new google.maps.LatLng(37.779695, -122.403950), 
 
    new google.maps.LatLng(37.779982, -122.403584), 
 
    new google.maps.LatLng(37.780295, -122.403223), 
 
    new google.maps.LatLng(37.780664, -122.402766), 
 
    new google.maps.LatLng(37.781043, -122.402288), 
 
    new google.maps.LatLng(37.781399, -122.401823), 
 
    new google.maps.LatLng(37.781727, -122.401407), 
 
    new google.maps.LatLng(37.781853, -122.401247), 
 
    new google.maps.LatLng(37.781894, -122.401195), 
 
    new google.maps.LatLng(37.782076, -122.400977), 
 
    new google.maps.LatLng(37.782338, -122.400603), 
 
    new google.maps.LatLng(37.782666, -122.400133), 
 
    new google.maps.LatLng(37.783048, -122.399634), 
 
    new google.maps.LatLng(37.783450, -122.399198), 
 
    new google.maps.LatLng(37.783791, -122.398998), 
 
    new google.maps.LatLng(37.784177, -122.398959), 
 
    new google.maps.LatLng(37.784388, -122.398971), 
 
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];

<script src="https://maps.googleapis.com/maps/api/js?libraries=visualization"></script> 
 
<div id="panel"> 
 
    <button onclick="toggleHeatmap()">Toggle Heatmap</button> 
 
    <button onclick="changeGradient()">Change gradient</button> 
 
    <button onclick="changeRadius()">Change radius</button> 
 
    <button onclick="changeOpacity()">Change opacity</button> 
 
</div> 
 
<div id="map-canvas" style="height:500px; width:600px;"></div>

來源

2013-05-31 00:46:14 geocodezip

這是偉大的工作！並感謝這個工作示例！真的很感激它。 – user2438546

至少在3.17中，有多個熱圖圖層沒有問題;你可以用heatmap.setMap（null | map）切換每一個。 – ejain

由於我們在2個獨立數組中存儲經緯度，不應該在切換時更改熱圖圖案嗎？目前熱點圖消失，並在點擊切換按鈕時重新出現......這是預期的行爲嗎？ – Lucy

在Google熱圖中的數據切換

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