文章来源于网络收集而来，版权归原创者所有，如有侵权请及时联系！

Custom Canvas Tiles

发布于 2022-11-30 23:36:02 字数 3448 浏览 0 评论 0 收藏 0

Renders tiles with TMS coordinates for debugging.

这些黑色网格瓦片是通过 HTML5 canvas 在客户端创建的。这里展示的 TMS 瓦片坐标索引是使用 TMS 自定义模板、矢量瓦片资源的 512 像素瓦片和矢量瓦片 zDirection 设置来生成的。

main.js

import 'ol/ol.css';
import MVT from 'ol/format/MVT';
import Map from 'ol/Map';
import TileDebug from 'ol/source/TileDebug';
import TileLayer from 'ol/layer/Tile';
import VectorTileLayer from 'ol/layer/VectorTile';
import VectorTileSource from 'ol/source/VectorTile';
import View from 'ol/View';
import {Fill, Stroke, Style, Text} from 'ol/style';

const style = new Style({
  fill: new Fill({
    color: 'rgba(255, 255, 255, 0.6)',
  }),
  stroke: new Stroke({
    color: '#319FD3',
    width: 1,
  }),
  text: new Text({
    font: '12px Calibri,sans-serif',
    fill: new Fill({
      color: '#000',
    }),
    stroke: new Stroke({
      color: '#fff',
      width: 3,
    }),
  }),
});

const vtLayer = new VectorTileLayer({
  declutter: true,
  source: new VectorTileSource({
    maxZoom: 15,
    format: new MVT(),
    url:
      'https://ahocevar.com/geoserver/gwc/service/tms/1.0.0/' +
      'ne:ne_10m_admin_0_countries@EPSG%3A900913@pbf/{z}/{x}/{-y}.pbf',
  }),
  style: function (feature) {
    style.getText().setText(feature.get('name'));
    return style;
  },
});

const debugLayer = new TileLayer({
  source: new TileDebug({
    template: 'z:{z} x:{x} y:{-y}',
    projection: vtLayer.getSource().getProjection(),
    tileGrid: vtLayer.getSource().getTileGrid(),
    zDirection: 1,
  }),
});

const map = new Map({
  layers: [vtLayer, debugLayer],
  target: 'map',
  view: new View({
    center: [0, 6000000],
    zoom: 4,
  }),
});

index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <title>Custom Canvas Tiles</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": "canvas-tiles-tms",
  "dependencies": {
    "ol": "7.1.0"
  },
  "devDependencies": {
    "parcel": "^2.0.0-beta.1"
  },
  "scripts": {
    "start": "parcel index.html",
    "build": "parcel build --public-url . index.html"
  }
}

分享到QQ

分享到微博

如果你对这篇内容有疑问，欢迎到本站社区发帖提问参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。

发布评论

需要登录才能够评论，你可以免费注册一个本站的账号。

列表为空，暂无数据