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javascript - 在 Mapbox 中使用 map.addLayer 添加编辑多边形

转载 作者：行者123 更新时间：2023-11-29 18:47:00 26 4
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我想编辑我在 mapbox 上使用 map.addLayer() 添加的多边形。

代码:

map.addLayer({
    'id': 'maine'+id,
    'type': 'fill',
    'source': {
        'type': 'geojson',
        'data': {
            'type': 'Feature',
            'geometry': {
                'type': 'Polygon',
                'coordinates': coords
            }
        }
    },
    'layout': {},
    'paint': {
        'fill-color': '#088',
        'fill-opacity': 0.8
    }
});

最佳答案

Mapbox GL 绘图库用于绘制/编辑形状。

您已将多边形添加为 map 层。直接在绘图模式下编辑图层似乎是不可能的。这是一种可能的方法

  1. 您需要先隐藏图层。
  2. 从图层源获取多边形数据
  3. 初始化绘图模式并使用多边形数据将新多边形添加到绘图管理器
  4. 编辑完成后，使用来自绘图管理器的已编辑多边形数据更新图层源
  5. 从绘图管理器中删除多边形
  6. 显示更新后的图层

您需要使用add 方法来绘制现有形状。

draw.add({
            'id': 'polygon-3355',
            'type': 'Feature',
            'properties': {},
            'geometry': {
                'type': 'Polygon',
                'coordinates': [[[-67.13734351262877, 45.137451890638886],
                    [-66.96466, 44.8097],
                    [-68.03252, 44.3252],
                    [-69.06, 43.98],
                    [-70.11617, 43.68405],
                    [-70.64573401557249, 43.090083319667144],
                    [-70.75102474636725, 43.08003225358635],
                    [-70.79761105007827, 43.21973948828747],
                    [-70.98176001655037, 43.36789581966826],
                    [-70.94416541205806, 43.46633942318431],
                    [-71.08482, 45.3052400000002],
                    [-70.6600225491012, 45.46022288673396],
                    [-70.30495378282376, 45.914794623389355],
                    [-70.00014034695016, 46.69317088478567],
                    [-69.23708614772835, 47.44777598732787],
                    [-68.90478084987546, 47.184794623394396],
                    [-68.23430497910454, 47.35462921812177],
                    [-67.79035274928509, 47.066248887716995],
                    [-67.79141211614706, 45.702585354182816],
                    [-67.13734351262877, 45.137451890638886]]]
            }
        });

图书馆链接: https://github.com/mapbox/mapbox-gl-draw

API 方法引用: https://github.com/mapbox/mapbox-gl-draw/blob/master/docs/API.md 

<!DOCTYPE html>
<html>
<head>
    <meta charset='utf-8' />
    <title>Show drawn polygon area</title>
    <meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' />
    <script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.js'></script>
    <link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.50.0/mapbox-gl.css' rel='stylesheet' />
    <style>
        body { margin:0; padding:0; }
        #map { position:absolute; top:0; bottom:0; width:100%; }
    </style>
</head>
<body>

<style>
    .calculation-box {
        height: 75px;
        width: 150px;
        position: absolute;
        bottom: 40px;
        left: 10px;
        background-color: rgba(255, 255, 255, .9);
        padding: 15px;
        text-align: center;
    }

    p {
        font-family: 'Open Sans';
        margin: 0;
        font-size: 13px;
    }
</style>

<script src='https://api.tiles.mapbox.com/mapbox.js/plugins/turf/v3.0.11/turf.min.js'></script>
<script src='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.js'></script>
<link rel='stylesheet' href='https://api.mapbox.com/mapbox-gl-js/plugins/mapbox-gl-draw/v1.0.9/mapbox-gl-draw.css' type='text/css'/>
<div id='map'></div>
<div class='calculation-box'>
    <p>Draw a polygon using the draw tools.</p>
    <div id='calculated-area'></div>
</div>

<script>

    mapboxgl.accessToken = 'pk.eyJ1IjoiZWRlbnJheWdhcmRuZXIiLCJhIjoiRlZRVlhqOCJ9.tDrWaeNRbMCtXAovQLYuzA';

    /* eslint-disable */
    var map = new mapboxgl.Map({
        container: 'map', // container id
        style: 'mapbox://styles/mapbox/streets-v8',
        center:  [-70.11617, 43.68405],
        zoom: 5
    });

    var draw = new MapboxDraw({
        displayControlsDefault: false,
        controls: {
            polygon: true,
            trash: true
        }
    });
    map.addControl(draw);

    map.on('draw.create', updateArea);
    map.on('draw.delete', updateArea);
    map.on('draw.update', updateArea);


    draw.add({
        'id': 'polygon-3355',
        'type': 'Feature',
        'properties': {},
        'geometry': {
            'type': 'Polygon',
            'coordinates': [[[-67.13734351262877, 45.137451890638886],
                [-66.96466, 44.8097],
                [-68.03252, 44.3252],
                [-69.06, 43.98],
                [-70.11617, 43.68405],
                [-70.64573401557249, 43.090083319667144],
                [-70.75102474636725, 43.08003225358635],
                [-70.79761105007827, 43.21973948828747],
                [-70.98176001655037, 43.36789581966826],
                [-70.94416541205806, 43.46633942318431],
                [-71.08482, 45.3052400000002],
                [-70.6600225491012, 45.46022288673396],
                [-70.30495378282376, 45.914794623389355],
                [-70.00014034695016, 46.69317088478567],
                [-69.23708614772835, 47.44777598732787],
                [-68.90478084987546, 47.184794623394396],
                [-68.23430497910454, 47.35462921812177],
                [-67.79035274928509, 47.066248887716995],
                [-67.79141211614706, 45.702585354182816],
                [-67.13734351262877, 45.137451890638886]]]
        }
    });

    function updateArea(e) {
        var data = draw.getAll();
        var answer = document.getElementById('calculated-area');
        if (data.features.length > 0) {
            var area = turf.area(data);
            // restrict to area to 2 decimal points
            var rounded_area = Math.round(area*100)/100;
            answer.innerHTML = '<p><strong>' + rounded_area + '</strong></p><p>square meters</p>';
        } else {
            answer.innerHTML = '';
            if (e.type !== 'draw.delete') alert("Use the draw tools to draw a polygon!");
        }
    }

</script>

</body>
</html>

关于javascript - 在 Mapbox 中使用 map.addLayer 添加编辑多边形，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/53021239/

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