mirror of https://gitee.com/antv-l7/antv-l7
41 lines
988 B
Markdown
41 lines
988 B
Markdown
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---
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title: 栅格图层
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order: 5
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---
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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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L7 本身内部没有提供栅格数据格式 如 tiff,需要外部解析好做为Source 传入。
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## 使用
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```javascript
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import { RasterLayer } from '@antv/l7';
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```
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## source
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见 [raster source](../source/raster)
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## shape
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```raster```
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## size
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无
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## color
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无
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## style
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- clampLow Boolean 默认 false, 设置为true，低于domain的数据将不显示
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- clampHigh Boolean 默认 false, 设置为true，高于domain的数据将不显示
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- opacity: 0.8 Number 透明度
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- domain: [ 0, 8000 ] 数据映射区间
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- noDataValue Number noDataValue 不会显示
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- rampColors: {
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colors: [ '#FF4818', '#F7B74A', '#FFF598', '#91EABC', '#2EA9A1', '#206C7C' ].reverse(),
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positions: [ 0, 0.2, 0.4, 0.6, 0.8, 1.0 ]
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} // 色带
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:warning: color, position 的长度要相同
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