antv-l7/docs/api/point_layer/pointlayer.zh.md

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---
title: PointLayer
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order: 0
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---
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`markdown:docs/common/style.md`
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## 简介
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点数据的展示,根据经纬点绘制图形,数据源支持 JSON、GeoJSON、CSV 三种数据格式。
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- [GeoJSON](../source/geojson/#point)
- [CSV](../source/csv/#parser)
- [JSON](../source/json/#点数据)
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🌟 通常每种数据都需要相应的 parser 解析数据
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```javascript
// 传入 JSON 类型的数据
var data = [
{
lng: 120,
lat: 30
},
...
]
var layer = new PointLayer()
.source(data, {
parser: {
type: 'json',
x: 'lng',
y: 'lat',
}
})
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// 传入 GeoJSON 类型数据 *** L7 默认支持,不需要 parser 解析
var data = {
type: 'FeatureCollection',
features: [
{
type: 'Feature',
properties: {},
geometry: {
type: 'Polygon',
coordinates: [
[120, 30],
...
]
},
},
],
};
var layer = new PointLayer()
.source(data)
// 传入 txt 类型数据
var data = `from,to,value,type,lng1,lat1,lng2,lat2
鎷夎惃,娴疯タ,6.91,move_out,91.111891,29.662557,97.342625,37.373799
鎷夎惃,鎴愰兘,4.79,move_out,91.111891,29.662557,104.067923,30.679943
鎷夎惃,閲嶅簡,2.41,move_out,91.111891,29.662557,106.530635,29.544606
鎷夎惃,鍖椾含,2.05,move_out,91.111891,29.662557,116.395645,39.929986
...`
var layer = new PointLayer()
.source(data, {
parser: {
type: 'csv',
x: 'lng1',
y: 'lat1',
}
})
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```
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## shape 类型
PointLayer 图层支持多种 shape 类型,通过改变 shape 我们可以显示不同的点
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**2D 符号图**
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<img width="60%" style="display: block;margin: 0 auto;" alt="案例" src='https://gw.alipayobjects.com/mdn/antv_site/afts/img/A*iN0nTYRDd3AAAAAAAAAAAABkARQnAQ'>
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```
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'simple', 'circle', 'square', 'hexagon', 'triangle' 'pentagon', 'octogon', 'hexagram','rhombus', 'vesica',
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```
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**3D 类型 柱图**
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<img width="60%" style="display: block;margin: 0 auto;" alt="案例" src='https://gw.alipayobjects.com/mdn/antv_site/afts/img/A*tvpvQZLv_xYAAAAAAAAAAABkARQnAQ'>
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```
'cylinder', 'triangleColumn', 'hexagonColumn', 'squareColumn'
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```
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🌟 若是使用简单的圆点图层,建议使用 simple 代替 circle 以获得更好的性能
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### 基本用法
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```javascript
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import { PointLayer } from '@antv/l7';
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const layer = PointLayer({
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zIndex: 2,
})
.source(data.list, {
type: 'array',
x: 'j',
y: 'w',
})
.shape('cylinder')
.size('t', (level) => {
return [4, 4, level + 40];
})
.color('t', [
'#002466',
'#105CB3',
'#2894E0',
'#CFF6FF',
'#FFF5B8',
'#FFAB5C',
'#F27049',
'#730D1C',
]);
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```
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`markdown:docs/common/layer/base.md`