Question

我正在创建一个Point功能，如下所示：

const myFeature = {
    "geometry": {"coordinates": [position[0], position[1]], "type": "Point"},
    "type": "Feature",
    "id": 'my-point-feature'
  }
this.geoJSONObject['features'].push(myFeature)

这很完美。

但是当我这样做时：

const myFeature = new Feature(new Point([position[0], position[1]]))
myFeature.setId('my-point-feature')
this.geoJSONObject['features'].push(myFeature)

我收到错误消息：

未捕获的TypeError：geometryReader不是函数在Function._ol_format_GeoJSON_.readGeometry_（geojson.js：78）在_ol_format_GeoJSON_.readFeatureFromObject（geojson.js：382）位于_ol_format_GeoJSON_.readFeaturesFromObject（geojson.js：415）在_ol_format_GeoJSON _._ ol_format_JSONFeature_.readFeatures（jsonfeature.js：60）

为什么这种行为上的差异？

Answer 1

GeoJSON功能和OpenLayers功能是不同的对象类型，请使用new GeoJSON().writeFeatureObject和new GeoJSON().readFeature在格式之间进行转换：

const myFeature = new Feature(new Point([position[0], position[1]]))
myFeature.setId('my-point-feature')
const gjFeature = new GeoJSON().writeFeatureObject(myFeature)
this.geoJSONObject['features'].push(gjFeature)

Openlayers功能创建问题

1 个答案: