This example overlays a heatmap on top of the map. It includes buttons that allow users to change the appearance of the heatmap.
Read the documentation.
// This example requires the Visualization library. Include the libraries=visualization // parameter when you first load the API. For example: // <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=visualization"> var map, heatmap; function initMap() { map = new google.maps.Map(document.getElementById('map'), { zoom: 13, center: {lat: 37.775, lng: -122.434}, mapTypeId: 'satellite' }); heatmap = new google.maps.visualization.HeatmapLayer({ data: getPoints(), map: map }); } function toggleHeatmap() { heatmap.setMap(heatmap.getMap() ? null : map); } 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.set('gradient', heatmap.get('gradient') ? null : gradient); } function changeRadius() { heatmap.set('radius', heatmap.get('radius') ? null : 20); } function changeOpacity() { heatmap.set('opacity', heatmap.get('opacity') ? null : 0.2); } // Heatmap data: 500 Points function getPoints() { return [ 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(37.778542, -122.438492), new google.maps.LatLng(37.778100, -122.438411), new google.maps.LatLng(37.777986, -122.438376), new google.maps.LatLng(37.777680, -122.438313), new google.maps.LatLng(37.777316, -122.438273), new google.maps.LatLng(37.777135, -122.438254), new google.maps.LatLng(37.776987, -122.438303), new google.maps.LatLng(37.776946, -122.438404), new google.maps.LatLng(37.776944, -122.438467), new google.maps.LatLng(37.776892, -122.438459), new google.maps.LatLng(37.776842, -122.438442), new google.maps.LatLng(37.776822, -122.438391), new google.maps.LatLng(37.776814, -122.438412), new google.maps.LatLng(37.776787, -122.438628), new google.maps.LatLng(37.776729, -122.438650), new google.maps.LatLng(37.776759, -122.438677), new google.maps.LatLng(37.776772, -122.438498), new google.maps.LatLng(37.776787, -122.438389), new google.maps.LatLng(37.776848, -122.438283), new google.maps.LatLng(37.776870, -122.438239), new google.maps.LatLng(37.777015, -122.438198), new google.maps.LatLng(37.777333, -122.438256), new google.maps.LatLng(37.777595, -122.438308), new google.maps.LatLng(37.777797, -122.438344), new google.maps.LatLng(37.778160, -122.438442), new google.maps.LatLng(37.778414, -122.438508), new google.maps.LatLng(37.778445, -122.438516), new google.maps.LatLng(37.778503, -122.438529), new google.maps.LatLng(37.778607, -122.438549), new google.maps.LatLng(37.778670, -122.438644), new google.maps.LatLng(37.778847, -122.438706), new google.maps.LatLng(37.779240, -122.438744), new google.maps.LatLng(37.779738, -122.438822), new google.maps.LatLng(37.780201, -122.438882), new google.maps.LatLng(37.780400, -122.438905), new google.maps.LatLng(37.780501, -122.438921), new google.maps.LatLng(37.780892, -122.438986), new google.maps.LatLng(37.781446, -122.439087), new google.maps.LatLng(37.781985, -122.439199), new google.maps.LatLng(37.782239, -122.439249), new google.maps.LatLng(37.782286, -122.439266), new google.maps.LatLng(37.797847, -122.429388), new google.maps.LatLng(37.797874, -122.429180), new google.maps.LatLng(37.797885, -122.429069), new google.maps.LatLng(37.797887, -122.429050), new google.maps.LatLng(37.797933, -122.428954), new google.maps.LatLng(37.798242, -122.428990), new google.maps.LatLng(37.798617, -122.429075), new google.maps.LatLng(37.798719, -122.429092), new google.maps.LatLng(37.798944, -122.429145), new google.maps.LatLng(37.799320, -122.429251), new google.maps.LatLng(37.799590, -122.429309), new google.maps.LatLng(37.799677, -122.429324), new google.maps.LatLng(37.799966, -122.429360), new google.maps.LatLng(37.800288, -122.429430), new google.maps.LatLng(37.800443, -122.429461), new google.maps.LatLng(37.800465, -122.429474), new google.maps.LatLng(37.800644, -122.429540), new google.maps.LatLng(37.800948, -122.429620), new google.maps.LatLng(37.801242, -122.429685), new google.maps.LatLng(37.801375, -122.429702), new google.maps.LatLng(37.801400, -122.429703), new google.maps.LatLng(37.801453, -122.429707), new google.maps.LatLng(37.801473, -122.429709), new google.maps.LatLng(37.801532, -122.429707), new google.maps.LatLng(37.801852, -122.429729), new google.maps.LatLng(37.802173, -122.429789), new google.maps.LatLng(37.802459, -122.429847), new google.maps.LatLng(37.802554, -122.429825), new google.maps.LatLng(37.802647, -122.429549), new google.maps.LatLng(37.802693, -122.429179), new google.maps.LatLng(37.802729, -122.428751), new google.maps.LatLng(37.766104, -122.409291), new google.maps.LatLng(37.766103, -122.409268), new google.maps.LatLng(37.766138, -122.409229), new google.maps.LatLng(37.766183, -122.409231), new google.maps.LatLng(37.766153, -122.409276), new google.maps.LatLng(37.766005, -122.409365), new google.maps.LatLng(37.765897, -122.409570), new google.maps.LatLng(37.765767, -122.409739), new google.maps.LatLng(37.765693, -122.410389), new google.maps.LatLng(37.765615, -122.411201), new google.maps.LatLng(37.765533, -122.412121), new google.maps.LatLng(37.765467, -122.412939), new google.maps.LatLng(37.765444, -122.414821), new google.maps.LatLng(37.765444, -122.414964), new google.maps.LatLng(37.765318, -122.415424), new google.maps.LatLng(37.763961, -122.415296), new google.maps.LatLng(37.763115, -122.415196), new google.maps.LatLng(37.762967, -122.415183), new google.maps.LatLng(37.762278, -122.415127), new google.maps.LatLng(37.761675, -122.415055), new google.maps.LatLng(37.760932, -122.414988), new google.maps.LatLng(37.759337, -122.414862), new google.maps.LatLng(37.773187, -122.421922), new google.maps.LatLng(37.773043, -122.422118), new google.maps.LatLng(37.773007, -122.422165), new google.maps.LatLng(37.772979, -122.422219), new google.maps.LatLng(37.772865, -122.422394), new google.maps.LatLng(37.772779, -122.422503), new google.maps.LatLng(37.772676, -122.422701), new google.maps.LatLng(37.772606, -122.422806), new google.maps.LatLng(37.772566, -122.422840), new google.maps.LatLng(37.772508, -122.422852), new google.maps.LatLng(37.772387, -122.423011), new google.maps.LatLng(37.772099, -122.423328), new google.maps.LatLng(37.771704, -122.423783), new google.maps.LatLng(37.771481, -122.424081), new google.maps.LatLng(37.771400, -122.424179), new google.maps.LatLng(37.771352, -122.424220), new google.maps.LatLng(37.771248, -122.424327), new google.maps.LatLng(37.770904, -122.424781), new google.maps.LatLng(37.770520, -122.425283), new google.maps.LatLng(37.770337, -122.425553), new google.maps.LatLng(37.770128, -122.425832), new google.maps.LatLng(37.769756, -122.426331), new google.maps.LatLng(37.769300, -122.426902), new google.maps.LatLng(37.769132, -122.427065), new google.maps.LatLng(37.769092, -122.427103), new google.maps.LatLng(37.768979, -122.427172), new google.maps.LatLng(37.768595, -122.427634), new google.maps.LatLng(37.768372, -122.427913), new google.maps.LatLng(37.768337, -122.427961), 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), new google.maps.LatLng(37.765153, -122.418618), new google.maps.LatLng(37.765136, -122.419112), new google.maps.LatLng(37.765129, -122.419378), new google.maps.LatLng(37.765119, -122.419481), new google.maps.LatLng(37.765100, -122.419852), new google.maps.LatLng(37.765083, -122.420349), new google.maps.LatLng(37.765045, -122.420930), new google.maps.LatLng(37.764992, -122.421481), new google.maps.LatLng(37.764980, -122.421695), new google.maps.LatLng(37.764993, -122.421843), new google.maps.LatLng(37.764986, -122.422255), new google.maps.LatLng(37.764975, -122.422823), new google.maps.LatLng(37.764939, -122.423411), new google.maps.LatLng(37.764902, -122.424014), new google.maps.LatLng(37.764853, -122.424576), new google.maps.LatLng(37.764826, -122.424922), new google.maps.LatLng(37.764796, -122.425375), new google.maps.LatLng(37.764782, -122.425869), new google.maps.LatLng(37.764768, -122.426089), new google.maps.LatLng(37.764766, -122.426117), new google.maps.LatLng(37.764723, -122.426276), new google.maps.LatLng(37.764681, -122.426649), new google.maps.LatLng(37.782012, -122.404200), new google.maps.LatLng(37.781574, -122.404911), new google.maps.LatLng(37.781055, -122.405597), new google.maps.LatLng(37.780479, -122.406341), new google.maps.LatLng(37.779996, -122.406939), new google.maps.LatLng(37.779459, -122.407613), new google.maps.LatLng(37.778953, -122.408228), new google.maps.LatLng(37.778409, -122.408839), new google.maps.LatLng(37.777842, -122.409501), new google.maps.LatLng(37.777334, -122.410181), new google.maps.LatLng(37.776809, -122.410836), new google.maps.LatLng(37.776240, -122.411514), new google.maps.LatLng(37.775725, -122.412145), new google.maps.LatLng(37.775190, -122.412805), new google.maps.LatLng(37.774672, -122.413464), new google.maps.LatLng(37.774084, -122.414186), new google.maps.LatLng(37.773533, -122.413636), new google.maps.LatLng(37.773021, -122.413009), new google.maps.LatLng(37.772501, -122.412371), new google.maps.LatLng(37.771964, -122.411681), new google.maps.LatLng(37.771479, -122.411078), new google.maps.LatLng(37.770992, -122.410477), new google.maps.LatLng(37.770467, -122.409801), new google.maps.LatLng(37.770090, -122.408904), new google.maps.LatLng(37.769657, -122.408103), new google.maps.LatLng(37.769132, -122.407276), new google.maps.LatLng(37.768564, -122.406469), new google.maps.LatLng(37.767980, -122.405745), new google.maps.LatLng(37.767380, -122.405299), new google.maps.LatLng(37.766604, -122.405297), new google.maps.LatLng(37.765838, -122.405200), new google.maps.LatLng(37.765139, -122.405139), new google.maps.LatLng(37.764457, -122.405094), new google.maps.LatLng(37.763716, -122.405142), new google.maps.LatLng(37.762932, -122.405398), new google.maps.LatLng(37.762126, -122.405813), new google.maps.LatLng(37.761344, -122.406215), new google.maps.LatLng(37.760556, -122.406495), new google.maps.LatLng(37.759732, -122.406484), new google.maps.LatLng(37.758910, -122.406228), new google.maps.LatLng(37.758182, -122.405695), new google.maps.LatLng(37.757676, -122.405118), new google.maps.LatLng(37.757039, -122.404346), new google.maps.LatLng(37.756335, -122.403719), new google.maps.LatLng(37.755503, -122.403406), new google.maps.LatLng(37.754665, -122.403242), new google.maps.LatLng(37.753837, -122.403172), new google.maps.LatLng(37.752986, -122.403112), new google.maps.LatLng(37.751266, -122.403355) ]; }
<div id="floating-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"></div>
/* Always set the map height explicitly to define the size of the div * element that contains the map. */ #map { height: 100%; } /* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; }
#floating-panel { position: absolute; top: 10px; left: 25%; z-index: 5; background-color: #fff; padding: 5px; border: 1px solid #999; text-align: center; font-family: 'Roboto','sans-serif'; line-height: 30px; padding-left: 10px; }
#floating-panel { background-color: #fff; border: 1px solid #999; left: 25%; padding: 5px; position: absolute; top: 10px; z-index: 5; }
<!-- Replace the value of the key parameter with your own API key. --> <script async defer src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&libraries=visualization&callback=initMap"> </script>
Try it yourself
You can experiment with this code in JSFiddle by clicking the <>
icon in the
top-right corner of the code window.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Heatmaps</title>
<style>
/* Always set the map height explicitly to define the size of the div
* element that contains the map. */
#map {
height: 100%;
}
/* Optional: Makes the sample page fill the window. */
html, body {
height: 100%;
margin: 0;
padding: 0;
}
#floating-panel {
position: absolute;
top: 10px;
left: 25%;
z-index: 5;
background-color: #fff;
padding: 5px;
border: 1px solid #999;
text-align: center;
font-family: 'Roboto','sans-serif';
line-height: 30px;
padding-left: 10px;
}
#floating-panel {
background-color: #fff;
border: 1px solid #999;
left: 25%;
padding: 5px;
position: absolute;
top: 10px;
z-index: 5;
}
</style>
</head>
<body>
<div id="floating-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"></div>
<script>
// This example requires the Visualization library. Include the libraries=visualization
// parameter when you first load the API. For example:
// <script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&libraries=visualization">
var map, heatmap;
function initMap() {
map = new google.maps.Map(document.getElementById('map'), {
zoom: 13,
center: {lat: 37.775, lng: -122.434},
mapTypeId: 'satellite'
});
heatmap = new google.maps.visualization.HeatmapLayer({
data: getPoints(),
map: map
});
}
function toggleHeatmap() {
heatmap.setMap(heatmap.getMap() ? null : map);
}
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.set('gradient', heatmap.get('gradient') ? null : gradient);
}
function changeRadius() {
heatmap.set('radius', heatmap.get('radius') ? null : 20);
}
function changeOpacity() {
heatmap.set('opacity', heatmap.get('opacity') ? null : 0.2);
}
// Heatmap data: 500 Points
function getPoints() {
return [
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(37.778542, -122.438492),
new google.maps.LatLng(37.778100, -122.438411),
new google.maps.LatLng(37.777986, -122.438376),
new google.maps.LatLng(37.777680, -122.438313),
new google.maps.LatLng(37.777316, -122.438273),
new google.maps.LatLng(37.777135, -122.438254),
new google.maps.LatLng(37.776987, -122.438303),
new google.maps.LatLng(37.776946, -122.438404),
new google.maps.LatLng(37.776944, -122.438467),
new google.maps.LatLng(37.776892, -122.438459),
new google.maps.LatLng(37.776842, -122.438442),
new google.maps.LatLng(37.776822, -122.438391),
new google.maps.LatLng(37.776814, -122.438412),
new google.maps.LatLng(37.776787, -122.438628),
new google.maps.LatLng(37.776729, -122.438650),
new google.maps.LatLng(37.776759, -122.438677),
new google.maps.LatLng(37.776772, -122.438498),
new google.maps.LatLng(37.776787, -122.438389),
new google.maps.LatLng(37.776848, -122.438283),
new google.maps.LatLng(37.776870, -122.438239),
new google.maps.LatLng(37.777015, -122.438198),
new google.maps.LatLng(37.777333, -122.438256),
new google.maps.LatLng(37.777595, -122.438308),
new google.maps.LatLng(37.777797, -122.438344),
new google.maps.LatLng(37.778160, -122.438442),
new google.maps.LatLng(37.778414, -122.438508),
new google.maps.LatLng(37.778445, -122.438516),
new google.maps.LatLng(37.778503, -122.438529),
new google.maps.LatLng(37.778607, -122.438549),
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