---
title: "MarkerLayer 统一管理Marker"
language: "en"
canonical: "https://l7.antv.antgroup.com/en/examples/component/marker/markerlayer/"
---

# MarkerLayer 统一管理Marker

[Live example](https://l7.antv.antgroup.com/en/examples/component/marker/markerlayer/)

[Resource index](/llms.txt)

Provide a DOM element with `id="container"`. The original example source follows.

## Source

```js
import { Marker, MarkerLayer, Scene } from '@antv/l7';
import { GaodeMap } from '@antv/l7-maps';

const scene = new Scene({
  id: 'map',
  map: new GaodeMap({
    style: 'light',
    center: [105.790327, 36.495636],
    zoom: 4,
  }),
});
scene.on('loaded', () => {
  addMarkers();
  scene.render();
});
function addMarkers() {
  fetch('https://gw.alipayobjects.com/os/basement_prod/67f47049-8787-45fc-acfe-e19924afe032.json')
    .then((res) => res.json())
    .then((nodes) => {
      const markerLayer = new MarkerLayer();
      for (let i = 0; i < nodes.length; i++) {
        if (nodes[i].g !== '1' || nodes[i].v === '') {
          continue;
        }
        const el = document.createElement('label');
        el.className = 'labelclass';
        el.textContent = nodes[i].v + '℃';
        el.style.background = getColor(nodes[i].v);
        el.style.borderColor = getColor(nodes[i].v);
        const marker = new Marker({
          element: el,
        }).setLnglat({ lng: nodes[i].x * 1, lat: nodes[i].y });
        markerLayer.addMarker(marker);
      }
      scene.addMarkerLayer(markerLayer);
    });
}

function getColor(v) {
  const colors = [
    '#ffffe5',
    '#f7fcb9',
    '#d9f0a3',
    '#addd8e',
    '#78c679',
    '#41ab5d',
    '#238443',
    '#005a32',
  ];
  return v > 50
    ? colors[7]
    : v > 40
      ? colors[6]
      : v > 30
        ? colors[5]
        : v > 20
          ? colors[4]
          : v > 10
            ? colors[3]
            : v > 5
              ? colors[2]
              : v > 0
                ? colors[1]
                : colors[0];
}
```

## Runtime environment

Before evaluating the example, await this setup in a page containing #container. Supporting files follow below.

```js
await (await import("/src/demo/setup.ts")).default({ container: document.getElementById('container'), path: "/examples/component/marker/demo/markerlayer.js" });
```


## src/demo/setup.ts

```ts
import type { DemoSetupContext } from '@antv/astro-theme-antv';
import * as District from 'district-data';
import { GLTFLoader } from 'three/examples/jsm/loaders/GLTFLoader.js';

export default async function setup({ container, path }: DemoSetupContext) {
  // Tool pages provide their own React layout and SDK imports.
  if (!path.startsWith('/examples/')) return;
  // Retain only the original globals still used by gallery examples.
  Object.assign(window, { District, GLTFLoader });
  const map = document.createElement('div');
  map.id = 'map';
  container.append(map);
  await import('./map.css');
  // Match the original gallery's shared AMap environment, including raw AMap demos.
  await import('./amap');
}
```

## src/demo/map.css

```css
#map {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: 320px;
}

.labelclass {
  position: absolute;
  display: inline;
  cursor: pointer;
  background: rgb(255, 228, 120);
  border: solid 2px #fff;
  padding: 4px;
  white-space: nowrap;
  font:
    bold 12px/18px arial,
    sans-serif;
  color: #fff;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  line-height: 30px;
  /* opacity: 0.7; */
  text-align: center;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}
```

## src/demo/amap.ts

```ts
import AMapLoader from '@amap/amap-jsapi-loader';

// Preserve the site's development and production SDK registrations.
const credentials = import.meta.env.DEV
  ? { key: '6f025e700cbacbb0bb866712d20bb35c', securityJsCode: '290ddc4b0d33be7bc9b354bc6a4ca614' }
  : { key: 'f59bcf249433f8b05caaee19f349b3d7', securityJsCode: '2653011adeb04230b3a26cc9a780a800' };
window._AMapSecurityConfig = { securityJsCode: credentials.securityJsCode };
await AMapLoader.load({ key: credentials.key, version: '2.0', plugins: ['Map3D'] });
```