只是想知道是否有一种简单的方法可以使用热图图层与谷歌地图在两组或更多组数据数组变量之间切换？
经典的例子：
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,如果我想要一个vartaxiDataJan,vartaxiDataFeb并在2之间切换怎么办？我想创建一个切换按钮,然后在数据集之间切换,在这种情况下,在2个月之间.
我看了下面的内容：Updating heatmap data, simple google HeatMap
但是这只会在数组的底部添加一条新记录,而我想要替换整个数组
提前致谢！
解决方法:
看起来你一次只能有一个HeatMapLayer对象.这对我有用：
function toggleHeatmap() {
if (firstData) {
heatmap.setData(pointArray2);
firstData=false;
} else {
heatmap.setData(pointArray);
firstData=true;
}
}
代码段：
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),
new google.maps.LatLng(37.784404, -122.399128),
new google.maps.LatLng(37.784586, -122.399524),
new google.maps.LatLng(37.784835, -122.399927),
new google.maps.LatLng(37.785116, -122.400307),
new google.maps.LatLng(37.785282, -122.400539),
new google.maps.LatLng(37.785346, -122.400692),
new google.maps.LatLng(37.765769, -122.407201),
new google.maps.LatLng(37.765790, -122.407414),
new google.maps.LatLng(37.765802, -122.407755),
new google.maps.LatLng(37.765791, -122.408219),
new google.maps.LatLng(37.765763, -122.408759),
new google.maps.LatLng(37.765726, -122.409348),
new google.maps.LatLng(37.765716, -122.409882),
new google.maps.LatLng(37.765708, -122.410202),
new google.maps.LatLng(37.765705, -122.410253),
new google.maps.LatLng(37.765707, -122.410369),
new google.maps.LatLng(37.765692, -122.410720),
new google.maps.LatLng(37.765699, -122.411215),
new google.maps.LatLng(37.765687, -122.411789),
new google.maps.LatLng(37.765666, -122.412373),
new google.maps.LatLng(37.765598, -122.412883),
new google.maps.LatLng(37.765543, -122.413039),
new google.maps.LatLng(37.765532, -122.413125),
new google.maps.LatLng(37.765500, -122.413553),
new google.maps.LatLng(37.765448, -122.414053),
new google.maps.LatLng(37.765388, -122.414645),
new google.maps.LatLng(37.765323, -122.415250),
new google.maps.LatLng(37.765303, -122.415847),
new google.maps.LatLng(37.765251, -122.416439),
new google.maps.LatLng(37.765204, -122.417020),
new google.maps.LatLng(37.765172, -122.417556),
new google.maps.LatLng(37.765164, -122.418075),
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