原文链接及内容

原文链接：https://openlayers.org/en/latest/examples/epsg-4326.html

运行界面

创建一幅4326投影下的地图。

main.js代码如下：

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import Map from 'ol/Map.js';
import TileLayer from 'ol/layer/Tile.js';
import TileWMS from 'ol/source/TileWMS.js';
import View from 'ol/View.js';
import {ScaleLine, defaults as defaultControls} from 'ol/control.js';

const layers = [
  new TileLayer({
    source: new TileWMS({
      url: 'https://ahocevar.com/geoserver/wms',
      params: {
        'LAYERS': 'ne:NE1_HR_LC_SR_W_DR',
        'TILED': true,
      },
    }),
  }),
];

const map = new Map({
  controls: defaultControls().extend([
    new ScaleLine({
      units: 'degrees',
    }),
  ]),
  layers: layers,
  target: 'map',
  view: new View({
    projection: 'EPSG:4326',
    center: [0, 0],
    zoom: 2,
  }),
});

界面布局文件index.html代码如下：

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>EPSG:4326</title>
    <link rel="stylesheet" href="node_modules/ol/ol.css">
    <style>
      .map {
        width: 100%;
        height: 400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
    <script src="https://cdn.jsdelivr.net/npm/elm-pep@1.0.6/dist/elm-pep.js"></script>
    <script type="module" src="main.js"></script>
  </body>
</html>