2020-01-07 21:15:23 +08:00
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---
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title: Raster
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order: 5
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---
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2020-01-08 00:17:58 +08:00
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Raster 图层主要实现栅格数据的可视化，栅格数据主要来源是卫星遥感数据，如数字高程图，植被分布图，夜光图。
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2020-01-07 21:15:23 +08:00
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## parser
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- type: raster
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- extent: 栅格的经纬度范围 [minlng, minlat,maxLng, maxLat]
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- width 数据宽度
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- height 数据高度
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根据图片的经纬度范围，将图片添加到地图上。
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```javascript
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layer.source(
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'https://gw.alipayobjects.com/zos/rmsportal/FnHFeFklTzKDdUESRNDv.jpg',
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{
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parser: {
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type: 'raster',
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extent: [121.168, 30.2828, 121.384, 30.4219],
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},
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},
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);
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```
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