<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>武汉车辆密度分布</title>
<style>
html,
body,
#map {
width: 100%;
height: 100%;
margin: 0;
padding: 0;
}
.demo-title {
position: absolute;
top: 25px;
left: 25px;
z-index: 1;
}
h1 {
font-size: 18px;
margin: 0;
color: rgb(180, 180, 190);
}
h3 {
font-size: 12px;
font-weight: normal;
margin-top: 5px;
color: rgb(150,150,150);
}
</style>
</head>
<body>
<div class="demo-title">
<h1>网格图--武汉市车辆密度热力</h1>
<h3>通过热力映射车辆分布情况，颜色和高度体现出车辆密度</h3>
</div>
<div id="map"></div>
<script src="https://webapi.amap.com/maps?v=2.0&key=您申请的key值"></script>
<script src="https://webapi.amap.com/loca?v=2.0.0&key=您申请的key值"></script>
<script>
var map = new AMap.Map('map', {
zoom: 11.57,
center: [114.341232,30.567523],
// showLabel: false,
pitch: 45,
rotation: -163,
viewMode: '3D',
showLabel: false,
mapStyle: 'amap://styles/45311ae996a8bea0da10ad5151f72979',
});
var loca = new Loca.Container({
map,
});
loca.ambLight = {
intensity: 0.3,
color: '#fff',
};
loca.dirLight = {
intensity: 1.2,
color: '#fff',
target: [0, 1, 0],
position: [0, -1, 1],
};
loca.pointLight = {
color: 'rgb(100,100,100)',
position: [114.2517, 30.552128, 20000],
intensity: 1.6,
// 距离表示从光源到光照强度为 0 的位置，0 就是光不会消失。
distance: 100000,
};
var geo = new Loca.GeoJSONSource({
url: 'https://a.amap.com/Loca/static/loca-v2/demos/mock_data/wh_car.json',
});
var ll = new Loca.GridLayer({
// loca,
zIndex: 10,
opacity: 1,
visible: true,
zooms: [2, 22],
acceptLight: true,
// shinniness: 0,
// cullface: 'none',
// depth: true,
// hasSide: true,
});
var colors = ['#FAE200', '#D27E37', '#C53634', '#C12B6E', '#A92E9A', '#67238A', '#211A50', '#18244E'].reverse();
var heights = [100, 200, 400, 600, 800, 1400, 1800, 4000];
ll.setSource(geo);
ll.setStyle({
unit: 'meter',
radius:66,
gap: 0,
altitude: 100,
height: function (index, feature) {
var ranks = feature.coordinates && feature.coordinates.length || 0;
return ranks < 5 ?
heights[0] : ranks < 10 ?
heights[1] : ranks < 20 ?
heights[2] : ranks < 30 ?
heights[3] : ranks < 50 ?
heights[4] : ranks < 80 ?
heights[5] : ranks < 100 ?
heights[6] : heights[7];
},
topColor: function (index, feature) {
var ranks = feature.coordinates && feature.coordinates.length || 0;
return ranks < 5 ?
colors[0] : ranks < 10 ?
colors[1] : ranks < 20 ?
colors[2] : ranks < 30 ?
colors[3] : ranks < 50 ?
colors[4] : ranks < 80 ?
colors[5] : ranks < 100 ?
colors[6] : colors[7];
},
sideTopColor: function (index, feature) {
var ranks = feature.coordinates && feature.coordinates.length || 0;
return ranks < 5 ?
colors[0] : ranks < 10 ?
colors[1] : ranks < 20 ?
colors[2] : ranks < 30 ?
colors[3] : ranks < 50 ?
colors[4] : ranks < 80 ?
colors[5] : ranks < 100 ?
colors[6] : colors[7];
},
sideBottomColor: function (index, feature) {
var ranks = feature.coordinates && feature.coordinates.length || 0;
return ranks < 5 ?
colors[0] : ranks < 10 ?
colors[1] : ranks < 20 ?
colors[2] : ranks < 30 ?
colors[3] : ranks < 50 ?
colors[4] : ranks < 80 ?
colors[5] : ranks < 100 ?
colors[6] : colors[7];
}
});
loca.add(ll);
// 图例
var lengend = new Loca.Legend({
loca: loca,
title: {
label: '车辆密度(辆)',
fontColor: 'rgba(255,255,255,0.4)',
fontSize: '16px',
},
style: {
backgroundColor: 'rgba(255,255,255,0.1)',
left: '20px',
bottom: '40px',
fontSize: '12px',
},
dataMap: [
{ label: 100, color: colors[7] },
{ label: 80, color: colors[6] },
{ label: 50, color: colors[5] },
{ label: 40, color: colors[4] },
{ label: 30, color: colors[3] },
{ label: 20, color: colors[2] },
{ label: 10, color: colors[1] },
{ label: 5, color: colors[0] },
],
});
// 控制条
var dat = new Loca.Dat();
dat.addLight(loca.ambLight, loca, '环境光');
dat.addLight(loca.dirLight, loca, '平行光');
dat.addLight(loca.pointLight, loca, '点光');
dat.addLayer(ll, '车辆图层');
</script>
</body>
</html>
