原文链接及内容

原文链接：https://openlayers.org/en/latest/examples/graticule.html

运行界面

这个例子展示了如何在地图上添加经纬网图层。

main.js代码如下：

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import Graticule from 'ol/layer/Graticule.js';
import Map from 'ol/Map.js';
import OSM from 'ol/source/OSM.js';
import Stroke from 'ol/style/Stroke.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';
import {fromLonLat} from 'ol/proj.js';

const map = new Map({
  layers: [
    new TileLayer({
      source: new OSM({
        wrapX: false,
      }),
    }),
    new Graticule({
      // the style to use for the lines, optional.
      strokeStyle: new Stroke({
        color: 'rgba(255,120,0,0.9)',
        width: 2,
        lineDash: [0.5, 4],
      }),
      showLabels: true,
      wrapX: false,
    }),
  ],
  target: 'map',
  view: new View({
    center: fromLonLat([4.8, 47.75]),
    zoom: 5,
  }),
});

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>Map Graticule</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>