heatmap
用 MapboxLayer 的 heatmap 类型把点密度渲染为热力图，paint 控制半径与强度。
简介
MapboxLayer 设 type="heatmap" 把点密度渲染为热力图，heatmap-radius / heatmap-intensity / heatmap-opacity 调节观感。按属性加权的温度热力见 MapboxTemperature。
用法
200 个随机点的密度热力（暗色底图对比更清晰）：
<script setup lang="ts">
import type { FeatureCollection } from 'geojson'
const data: FeatureCollection = {
type: 'FeatureCollection',
features: Array.from({ length: 200 }, (_, i) => ({
type: 'Feature',
properties: {},
geometry: {
type: 'Point',
coordinates: [116.3 + ((i * 53) % 100) / 500, 39.85 + ((i * 71) % 100) / 600]
}
}))
}
</script>
<template>
<div class="h-115 w-full overflow-hidden rounded-(--ui-radius) border border-default">
<MapboxMap
:options="{ style: 'mapbox://styles/mapbox/dark-v11', center: [116.4, 39.93], zoom: 11 }"
>
<MapboxLayer
layer-id="heat"
type="heatmap"
:source="{ type: 'geojson', data }"
:paint="{
'heatmap-radius': 24,
'heatmap-intensity': 1,
'heatmap-opacity': 0.85
}"
/>
</MapboxMap>
</div>
</template>
API
Props
| Prop | Default | Type |
|---|---|---|
layerId | string图层 id，全局唯一 | |
type | "symbol" | "fill" | "line" | "circle" | "heatmap" | "fill-extrusion" | "building" | "raster" | "raster-particle" | "hillshade" | "model" | "background" | "sky" | "slot" | "clip"图层类型，决定渲染方式与可用的 paint / layout 属性 | |
source | string | mapboxgl.VectorSourceSpecification | mapboxgl.RasterSourceSpecification | mapboxgl.RasterDEMSourceSpecification | mapboxgl.RasterArraySourceSpecification | mapboxgl.GeoJSONSourceSpecification | mapboxgl.VideoSourceSpecification | mapboxgl.ImageSourceSpecification | mapboxgl.ModelSourceSpecificationsource id 字符串引用，或内联 source 对象（自动创建匿名源并随图层卸载） | |
sourceLayer | string矢量瓦片源内的子图层名（source-layer），消费矢量源时必填 | |
paint | PropBag绘制样式属性，响应式变更经 setPaintProperty 增量下发 | |
layout | PropBag布局属性，响应式变更经 setLayoutProperty 增量下发 | |
filter | mapboxgl.ExpressionSpecification | ["has", string] | ["!has", string] | ["==", string, string | number | boolean] | ["!=", string, string | number | boolean] | [">", string, string | number | boolean] | [">=", string, string | number | boolean] | ["<", string, string | number | boolean] | ["<=", string, string | number | boolean] | (string | mapboxgl.FilterSpecification)[]过滤表达式，仅渲染匹配的要素 | |
minzoom | 0 | number最小缩放级别，低于此级别不渲染 |
maxzoom | 24 | number最大缩放级别，高于此级别不渲染 |
beforeId | string插入到该 id 图层之前；省略则追加到图层栈顶部 |
Changelog
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