Heatmaps

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.

TypeScript

// 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">

let map: google.maps.Map, heatmap: google.maps.visualization.HeatmapLayer;

function initMap(): void {
  map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
    zoom: 13,
    center: { lat: 37.775, lng: -122.434 },
    mapTypeId: "satellite",
  });

  heatmap = new google.maps.visualization.HeatmapLayer({
    data: getPoints(),
    map: map,
  });

  document
    .getElementById("toggle-heatmap")!
    .addEventListener("click", toggleHeatmap);
  document
    .getElementById("change-gradient")!
    .addEventListener("click", changeGradient);
  document
    .getElementById("change-opacity")!
    .addEventListener("click", changeOpacity);
  document
    .getElementById("change-radius")!
    .addEventListener("click", changeRadius);
}

function toggleHeatmap(): void {
  heatmap.setMap(heatmap.getMap() ? null : map);
}

function changeGradient(): void {
  const 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(): void {
  heatmap.set("radius", heatmap.get("radius") ? null : 20);
}

function changeOpacity(): void {
  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(37.7831, -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, -122.43979),
    new google.maps.LatLng(37.784701, -122.439902),
    new google.maps.LatLng(37.784965, -122.439938),
    new google.maps.LatLng(37.78501, -122.439947),
    new google.maps.LatLng(37.78536, -122.439952),
    new google.maps.LatLng(37.785715, -122.44003),
    new google.maps.LatLng(37.786117, -122.440119),
    new google.maps.LatLng(37.786564, -122.440209),
    new google.maps.LatLng(37.786905, -122.44027),
    new google.maps.LatLng(37.786956, -122.440279),
    new google.maps.LatLng(37.800224, -122.43352),
    new google.maps.LatLng(37.800155, -122.434101),
    new google.maps.LatLng(37.80016, -122.43443),
    new google.maps.LatLng(37.800378, -122.434527),
    new google.maps.LatLng(37.800738, -122.434598),
    new google.maps.LatLng(37.800938, -122.43465),
    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, -122.43613),
    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(37.78612, -122.423112),
    new google.maps.LatLng(37.786433, -122.423029),
    new google.maps.LatLng(37.786631, -122.421213),
    new google.maps.LatLng(37.78666, -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, -122.39173),
    new google.maps.LatLng(37.78234, -122.392341),
    new google.maps.LatLng(37.782812, -122.393022),
    new google.maps.LatLng(37.7833, -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, -122.39578),
    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(37.7781, -122.438411),
    new google.maps.LatLng(37.777986, -122.438376),
    new google.maps.LatLng(37.77768, -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, -122.43865),
    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(37.77687, -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(37.77816, -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(37.77867, -122.438644),
    new google.maps.LatLng(37.778847, -122.438706),
    new google.maps.LatLng(37.77924, -122.438744),
    new google.maps.LatLng(37.779738, -122.438822),
    new google.maps.LatLng(37.780201, -122.438882),
    new google.maps.LatLng(37.7804, -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, -122.42918),
    new google.maps.LatLng(37.797885, -122.429069),
    new google.maps.LatLng(37.797887, -122.42905),
    new google.maps.LatLng(37.797933, -122.428954),
    new google.maps.LatLng(37.798242, -122.42899),
    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(37.79932, -122.429251),
    new google.maps.LatLng(37.79959, -122.429309),
    new google.maps.LatLng(37.799677, -122.429324),
    new google.maps.LatLng(37.799966, -122.42936),
    new google.maps.LatLng(37.800288, -122.42943),
    new google.maps.LatLng(37.800443, -122.429461),
    new google.maps.LatLng(37.800465, -122.429474),
    new google.maps.LatLng(37.800644, -122.42954),
    new google.maps.LatLng(37.800948, -122.42962),
    new google.maps.LatLng(37.801242, -122.429685),
    new google.maps.LatLng(37.801375, -122.429702),
    new google.maps.LatLng(37.8014, -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, -122.40957),
    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, -122.42284),
    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(37.7714, -122.424179),
    new google.maps.LatLng(37.771352, -122.42422),
    new google.maps.LatLng(37.771248, -122.424327),
    new google.maps.LatLng(37.770904, -122.424781),
    new google.maps.LatLng(37.77052, -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(37.7693, -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(37.76668, -122.430058),
    new google.maps.LatLng(37.766633, -122.430109),
    new google.maps.LatLng(37.76658, -122.430211),
    new google.maps.LatLng(37.766367, -122.430594),
    new google.maps.LatLng(37.76591, -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(37.76121, -122.440068),
    new google.maps.LatLng(37.761064, -122.44072),
    new google.maps.LatLng(37.76104, -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, -122.44457),
    new google.maps.LatLng(37.757687, -122.44334),
    new google.maps.LatLng(37.757583, -122.44324),
    new google.maps.LatLng(37.757019, -122.442787),
    new google.maps.LatLng(37.756603, -122.442322),
    new google.maps.LatLng(37.75638, -122.441602),
    new google.maps.LatLng(37.75579, -122.441382),
    new google.maps.LatLng(37.754493, -122.442133),
    new google.maps.LatLng(37.754361, -122.442206),
    new google.maps.LatLng(37.753719, -122.44265),
    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(37.75039, -122.44401),
    new google.maps.LatLng(37.750448, -122.444013),
    new google.maps.LatLng(37.750536, -122.44404),
    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(37.79106, -122.399334),
    new google.maps.LatLng(37.790538, -122.398718),
    new google.maps.LatLng(37.790095, -122.398086),
    new google.maps.LatLng(37.789644, -122.39736),
    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(37.78763, -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(37.78654, -122.39561),
    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, -122.39383),
    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(37.7855, -122.39365),
    new google.maps.LatLng(37.78577, -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, -122.40047),
    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, -122.40026),
    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, -122.40089),
    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(37.78566, -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(37.80174, -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(37.79975, -122.4217),
    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(37.77874, -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(37.77644, -122.4118),
    new google.maps.LatLng(37.776295, -122.411614),
    new google.maps.LatLng(37.776158, -122.41144),
    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, -122.40918),
    new google.maps.LatLng(37.775868, -122.40873),
    new google.maps.LatLng(37.776256, -122.40824),
    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, -122.40395),
    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(37.78345, -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(37.76579, -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, -122.41072),
    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(37.7655, -122.413553),
    new google.maps.LatLng(37.765448, -122.414053),
    new google.maps.LatLng(37.765388, -122.414645),
    new google.maps.LatLng(37.765323, -122.41525),
    new google.maps.LatLng(37.765303, -122.415847),
    new google.maps.LatLng(37.765251, -122.416439),
    new google.maps.LatLng(37.765204, -122.41702),
    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(37.7651, -122.419852),
    new google.maps.LatLng(37.765083, -122.420349),
    new google.maps.LatLng(37.765045, -122.42093),
    new google.maps.LatLng(37.764992, -122.421481),
    new google.maps.LatLng(37.76498, -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, -122.4042),
    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(37.77624, -122.411514),
    new google.maps.LatLng(37.775725, -122.412145),
    new google.maps.LatLng(37.77519, -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(37.77009, -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(37.76798, -122.405745),
    new google.maps.LatLng(37.76738, -122.405299),
    new google.maps.LatLng(37.766604, -122.405297),
    new google.maps.LatLng(37.765838, -122.4052),
    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(37.75891, -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),
  ];
}

declare global {
  interface Window {
    initMap: () => void;
  }
}
window.initMap = initMap;

JavaScript

// 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">
let 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,
  });
  document
    .getElementById("toggle-heatmap")
    .addEventListener("click", toggleHeatmap);
  document
    .getElementById("change-gradient")
    .addEventListener("click", changeGradient);
  document
    .getElementById("change-opacity")
    .addEventListener("click", changeOpacity);
  document
    .getElementById("change-radius")
    .addEventListener("click", changeRadius);
}

function toggleHeatmap() {
  heatmap.setMap(heatmap.getMap() ? null : map);
}

function changeGradient() {
  const 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(37.7831, -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, -122.43979),
    new google.maps.LatLng(37.784701, -122.439902),
    new google.maps.LatLng(37.784965, -122.439938),
    new google.maps.LatLng(37.78501, -122.439947),
    new google.maps.LatLng(37.78536, -122.439952),
    new google.maps.LatLng(37.785715, -122.44003),
    new google.maps.LatLng(37.786117, -122.440119),
    new google.maps.LatLng(37.786564, -122.440209),
    new google.maps.LatLng(37.786905, -122.44027),
    new google.maps.LatLng(37.786956, -122.440279),
    new google.maps.LatLng(37.800224, -122.43352),
    new google.maps.LatLng(37.800155, -122.434101),
    new google.maps.LatLng(37.80016, -122.43443),
    new google.maps.LatLng(37.800378, -122.434527),
    new google.maps.LatLng(37.800738, -122.434598),
    new google.maps.LatLng(37.800938, -122.43465),
    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, -122.43613),
    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(37.78612, -122.423112),
    new google.maps.LatLng(37.786433, -122.423029),
    new google.maps.LatLng(37.786631, -122.421213),
    new google.maps.LatLng(37.78666, -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, -122.39173),
    new google.maps.LatLng(37.78234, -122.392341),
    new google.maps.LatLng(37.782812, -122.393022),
    new google.maps.LatLng(37.7833, -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, -122.39578),
    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(37.7781, -122.438411),
    new google.maps.LatLng(37.777986, -122.438376),
    new google.maps.LatLng(37.77768, -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, -122.43865),
    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(37.77687, -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(37.77816, -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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    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(37.77624, -122.411514),
    new google.maps.LatLng(37.775725, -122.412145),
    new google.maps.LatLng(37.77519, -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(37.77009, -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(37.76798, -122.405745),
    new google.maps.LatLng(37.76738, -122.405299),
    new google.maps.LatLng(37.766604, -122.405297),
    new google.maps.LatLng(37.765838, -122.4052),
    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(37.75891, -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),
  ];
}

window.initMap = initMap;

CSS

/* 
 * 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;
}

HTML

<html>
  <head>
    <title>Heatmaps</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
  </head>
  <body>
    <div id="floating-panel">
      <button id="toggle-heatmap">Toggle Heatmap</button>
      <button id="change-gradient">Change gradient</button>
      <button id="change-radius">Change radius</button>
      <button id="change-opacity">Change opacity</button>
    </div>
    <div id="map"></div>

    <!-- 
     The `defer` attribute causes the callback to execute after the full HTML
     document has been parsed. For non-blocking uses, avoiding race conditions,
     and consistent behavior across browsers, consider loading using Promises
     with https://www.npmjs.com/package/@googlemaps/js-api-loader.
    -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&libraries=visualization&v=weekly"
      defer
    ></script>
  </body>
</html>

Try Sample

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  git clone -b sample-layer-heatmap https://github.com/googlemaps/js-samples.git
  cd js-samples
  npm i
  npm start

Other samples can be tried by switching to any branch beginning with sample-SAMPLE_NAME.

  git checkout sample-SAMPLE_NAME
  npm i
  npm start