局部的 OpenStreetMap

localized-openstreetmap 1 openseamap 1 openstreetmap 22

本示例演示自定义瓦片服务和自定位版权所属信息的局部（15-18级显示） OpenStreetMap.

基层是OpenCycleMap，上面有OpenSeaMap的覆盖层。基础图层为 OpenCycleMap，覆盖图层为 OpenSeaMap 。

main.js

import Map from 'ol/Map.js';
import OSM, {ATTRIBUTION} from 'ol/source/OSM.js';
import TileLayer from 'ol/layer/Tile.js';
import View from 'ol/View.js';

const openCycleMapLayer = new TileLayer({
  source: new OSM({
    attributions: [
      'All maps © <a href="https://www.opencyclemap.org/">OpenCycleMap</a>',
      ATTRIBUTION,
    ],
    url:
      'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
      '?apikey=Your API key from https://www.thunderforest.com/docs/apikeys/ here',
  }),
});

const openSeaMapLayer = new TileLayer({
  source: new OSM({
    attributions: [
      'All maps © <a href="https://www.openseamap.org/">OpenSeaMap</a>',
      ATTRIBUTION,
    ],
    opaque: false,
    url: 'https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png',
  }),
});

const map = new Map({
  layers: [openCycleMapLayer, openSeaMapLayer],
  target: 'map',
  view: new View({
    maxZoom: 18,
    center: [-244780.24508882355, 5986452.183179816],
    zoom: 15,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Localized OpenStreetMap</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="./resources/elm-pep.js"></script>
    <script type="module" src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "localized-openstreetmap",
  "dependencies": {
    "ol": "7.3.0"
  },
  "devDependencies": {
    "vite": "^3.2.3"
  },
  "scripts": {
    "start": "vite",
    "build": "vite build"
  }
}