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局部的 OpenStreetMap

发布于 2022-11-30 23:36:04 字数 3082 浏览 0 评论 0 收藏 0

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

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: 'http://www.wenjiangs.com/wp-content/uploads/2022/docimg28/{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>
    <!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer -->
    <script src="https://unpkg.com/elm-pep"></script>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v3/polyfill.min.js?features=fetch,requestAnimationFrame,Element.prototype.classList,URL,TextDecoder,Number.isInteger"></script>
    <style>
      .map {
        width: 100%;
        height:400px;
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <script src="main.js"></script>
  </body>
</html>

package.json

{
  "name": "localized-openstreetmap",
  "dependencies": {
    "ol": "7.1.0"
  },
  "devDependencies": {
    "parcel": "^2.0.0-beta.1"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --public-url . index.html"
  }
}

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