在 react-mapbox-gl 中显示多边形

Question

我在我的应用程序中使用这个包https://github.com/alex3165/react-mapbox-gl 。 我想显示多边形，但是当我这样做时：

console.log("Display polygon");

let polygonPaint = MapboxGL.FillPaint = {
    'fill-color': "#ff0000",
    'fill-opacity': 0.3
}

<Layer key={"polygonKey"} type="fill" paint={polygonPaint}>
    <Feature 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]]]
       }/>
 </Layer>

然后渲染循环......：/并一次又一次地渲染相同的多边形。 我已经尝试过使用 GeoJSONLayer 圆圈、标记，但只有<Layer>会导致此问题。
所以我的问题是我是否可以在 GeoJSONLayer 中显示多边形？ 我可以看到 mapbox 提供了这样的东西（ https://www.mapbox.com/mapbox-gl-js/example/geojson-polygon/ ），但我不知道如何在 React 包中做到这一点。

Answer 1

好的，我已经做到了。 数据对象应该有类型：“ FeatureCollection ”，然后几何对象应该有类型“多边形”。 GeoJSONLayer 需要“fillPaint”对象来显示漂亮的多边形；) 我的代码：geojson 对象

{  
   type: "FeatureCollection",
   features: [{
      "type": "Feature",
       "properties": {
             "category": cat,
           },
       "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]
                ]]
        }
   }]
}

和 GeoJSONLayer 组件使用

<GeoJSONLayer
   key={index}
   data={geojsonObject}
   fillPaint={polygonPaint}
/>

我希望它对某人有用:)

Answer 2

在当前的 react-mapbox-gl 版本（5.1.0）中，简单的解决方案对我有用：

<Layer
  type="fill"
  paint={{
    "fill-color": "#0091cd",
    "fill-opacity": 0.2,
  }}
>
  <Feature
    coordinates={myPolygonCoordinates}
  />
</Layer>