---
title: "heatmap"
description: "用 MapboxLayer 的 heatmap 类型把点密度渲染为热力图，paint 控制半径与强度。"
seo_title: "Heatmap Layer"
seo_description: "Render point density as a heatmap with MapboxLayer type=\"heatmap\", tuning heatmap-radius, intensity and opacity over a geojson source."
canonical_url: "https://mapbox.mhaibaraai.cn/docs/layers/heatmap"
---
# 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](/docs/environment/temperature)。

> \[\!NOTE\]
> See: /docs/core/layer
> 
> heatmap 由通用组件 MapboxLayer 承载，完整 Props 与事件见其文档。

## 用法

200 个随机点的密度热力（暗色底图对比更清晰）：

```vue [LayerHeatmapExample.vue]
<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

```ts
/**
 * Props for the MapboxLayer component
 */
interface MapboxLayerProps {
  /**
   * 图层 id，全局唯一
   */
  layerId: string;
  /**
   * 图层类型，决定渲染方式与可用的 paint / layout 属性
   */
  type: "symbol" | "fill" | "line" | "circle" | "heatmap" | "fill-extrusion" | "building" | "raster" | "raster-particle" | "hillshade" | "model" | "background" | "sky" | "slot" | "clip";
  /**
   * source 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）
   */
  source?: string | mapboxgl.SourceSpecification | undefined;
  /**
   * 矢量瓦片源内的子图层名（source-layer），消费矢量源时必填
   */
  sourceLayer?: string | undefined;
  /**
   * 绘制样式属性，响应式变更经 setPaintProperty 增量下发
   */
  paint?: PropBag | undefined;
  /**
   * 布局属性，响应式变更经 setLayoutProperty 增量下发
   */
  layout?: PropBag | undefined;
  /**
   * 过滤表达式，仅渲染匹配的要素
   */
  filter?: mapboxgl.FilterSpecification | undefined;
  /**
   * 最小缩放级别，低于此级别不渲染
   */
  minzoom?: number | undefined;
  /**
   * 最大缩放级别，高于此级别不渲染
   */
  maxzoom?: number | undefined;
  /**
   * 插入到该 id 图层之前；省略则追加到图层栈顶部
   */
  beforeId?: string | undefined;
}
```

## Changelog

See commit history for [src/runtime/components/Layer.vue](https://github.com/mhaibaraai/movk-mapbox/commits/main/src/runtime/components/Layer.vue).


## Sitemap

See the full [sitemap](/sitemap.md) for all pages.