Day26:mapbox-gl-compare

2024 iThome 鐵人賽

DAY 26

Modern Web

深入前端地圖框架技術探索系列第 26 篇

16th鐵人賽

y97213h53

團隊NUTC imac

2024-10-04 09:19:03

114 瀏覽

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mapbox-gl-compare 是一個 Mapbox 插件，允許用戶在兩個地圖實例之間進行視覺對比。通過在地圖上添加滑動條，用戶可以在兩張地圖上對比不同的數據或樣式。這個插件非常適合展示同一位置的不同時間、不同地圖樣式，或進行地圖的數據對比分析。

使用方式

mapbox-gl-compare這個插件可以使用cdn的方式引入

<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.js"></script>
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.css" type="text/css">

使用 new mapboxgl.Compare(map1, map2, container) 創建比較效果
const compare = new mapboxgl.Compare(map1, map2,container, {
});

範例

<!-- <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Route Distance Example with Markers</title>
  <link href="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.css" rel="stylesheet">
  <link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.css" type="text/css">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.js"></script>
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.js"></script>
  <style>
    #map1, #map2 {
      position: absolute;
      width: 50%;
      height: 100%;
    }
    #map1 {
      left: 0;
    }
    #map2 {
      right: 0;
    }
  </style>
</head>
<body>
  <div id="comparison-container">
    <div id="map1" class="map"></div>
    <div id="map2" class="map"></div>
</div>
<script>
mapboxgl.accessToken='pk.eyJ1IjoieTk3MjEzaDUzIiwiYSI6ImNtMW0wcXFwbzBiOXMyaXF1MHY0dnhqYXEifQ.zzBAlo4dnId23vSJdfqjbg';

var map1 = new mapboxgl.Map({
    container: 'map1',
    style: 'mapbox://styles/mapbox/streets-v11',
    center: [-74.5, 40],
    zoom: 9
});

var map2 = new mapboxgl.Map({
    container: 'map2',
    style: 'mapbox://styles/mapbox/satellite-v9',
    center: [-74.5, 40],
    zoom: 9
});
const container = '#comparison-container';
var compare = new mapboxgl.Compare(map1, map2, {
    mousemove: true
});


</script>
</body>
</html> -->

<html>
<head>
<meta charset="utf-8">
<title>Swipe between maps</title>
<meta name="viewport" content="initial-scale=1,maximum-scale=1,user-scalable=no">
<link href="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.css" rel="stylesheet">
<script src="https://api.mapbox.com/mapbox-gl-js/v3.7.0/mapbox-gl.js"></script>
<style>
body { margin: 0; padding: 0; }
#map { position: absolute; top: 0; bottom: 0; width: 100%; }
</style>
</head>
<body>
<style>
    body {
        overflow: hidden;
    }

    body * {
        -webkit-touch-callout: none;
        -webkit-user-select: none;
        -moz-user-select: none;
        -ms-user-select: none;
        user-select: none;
    }

    .map {
        position: absolute;
        top: 0;
        bottom: 0;
        width: 100%;
    }
</style>
<script src="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.js"></script>
<link rel="stylesheet" href="https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-compare/v0.4.0/mapbox-gl-compare.css" type="text/css">
<div id="comparison-container">
    <div id="before" class="map"></div>
    <div id="after" class="map"></div>
</div>
<script>
	mapboxgl.accessToken = 'pk.eyJ1IjoieTk3MjEzaDUzIiwiYSI6ImNtMW0wcXFwbzBiOXMyaXF1MHY0dnhqYXEifQ.zzBAlo4dnId23vSJdfqjbg';
    const beforeMap = new mapboxgl.Map({
        container: 'before',
        style: 'mapbox://styles/mapbox/light-v11',
        center: [0, 0],
        zoom: 0
    });

    const afterMap = new mapboxgl.Map({
        container: 'after',
        style: 'mapbox://styles/mapbox/dark-v11',
        center: [0, 0],
        zoom: 0
    });
    const container = '#comparison-container';

    const map = new mapboxgl.Compare(beforeMap, afterMap, container, {
    });
</script>

</body>
</html>

最後結果

在compare中還可以設定兩個參數
1.mousemove：當設置為 true 時，滑動條會隨著鼠標的移動自動滑動，無需點擊滑動條來手動調整。
2.orientation：設定滑動條的方向，預設為垂直（vertical），但可以改為水平（horizontal）來實現橫向分屏對比。這使得用戶可以更靈活地選擇適合的分屏效果。