高德地图
使用高德地图
注册账号并申请Key
引入 L7
2.0版本在L7内部动态引入了高德地图JS API,因此不再需要单独引入高德JS API,只需设置 type 为 amap
并且传入token
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.l7-2.0.0/dist/l7.js"></script>
添加div 标签指定地图容器
同时需要为Div设置 高度和宽度
<div id="map"></div>
初始化 L7 Scene
const scene = new L7.Scene({
id: 'map',
map: new L7.GaodeMap({
style: 'dark', // 样式URL
center: [120.19382669582967, 30.258134],
pitch: 0,
zoom: 12,
token: '高德地图token',
}),
});
这样我们就完成了通过L7 实例化高德地图
添加可视化图层
- 首先我们需要获取数据,获取数据方法,这里我们获取在线的json数据
- 然后我们就可以初始一个Layer,并添加到Scene就完成了图层的添加。
fetch('https://gw.alipayobjects.com/os/rmsportal/oVTMqfzuuRFKiDwhPSFL.json')
.then(res => res.json())
.then(data => {
const pointLayer = new L7.PointLayer({})
.source(data.list, {
parser: {
type: 'json',
x: 'j',
y: 'w',
},
})
.shape('cylinder')
.size('t', function(level) {
return [1, 2, level * 2 + 20];
})
.color('t', [
'#094D4A',
'#146968',
'#1D7F7E',
'#289899',
'#34B6B7',
'#4AC5AF',
'#5FD3A6',
'#7BE39E',
'#A1EDB8',
'#CEF8D6',
])
.style({
opacity: 1.0,
});
scene.addLayer(pointLayer);
});
完整demo代码
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>创建地图场景</title>
<style>
html,body{overflow:hidden;margin:0;}
#map { position:absolute; top:0; bottom:0; width:100%; }
</style>
</head>
<body>
<div id="map"></div>
<script src="https://gw.alipayobjects.com/os/antv/pkg/_antv.l7-2.0.0/dist/l7.js"></script>
<script>
const scene = new L7.Scene({
id: 'map',
map: new L7.GaodeMap({
style: 'dark', // 样式URL
center: [120.19382669582967, 30.258134],
pitch: 0,
zoom: 12,
token: '高德地图token',
}),
});
fetch('https://gw.alipayobjects.com/os/rmsportal/oVTMqfzuuRFKiDwhPSFL.json')
.then(res => res.json())
.then(data => {
const pointLayer = new L7.PointLayer({})
.source(data.list, {
parser: {
type: 'json',
x: 'j',
y: 'w'
}
})
.shape('cylinder')
.size('t', function(level) {
return [ 1, 2, level * 2 + 20 ];
})
.color('t', [
'#094D4A',
'#146968',
'#1D7F7E',
'#289899',
'#34B6B7',
'#4AC5AF',
'#5FD3A6',
'#7BE39E',
'#A1EDB8',
'#CEF8D6'
])
.style({
opacity: 1.0
});
scene.addLayer(pointLayer);
});
</script>
</body>
</html>