java - 如果属性中有几何图形，则 Geojson 文件无法正确导入

Question

输入文件:

{
  "type": "FeatureCollection",
  "name": "smth_name",
  "crs": {
    "type": "name",
    "properties": {
      "name": "urn:ogc:def:crs:EPSG::4326"
    }
  },
  "features": [
    {
      "type": "Feature",
      "properties": {
        "testid": 2,
        "other_geom": {
          "type": "Point", "coordinates": [44.3, 33.3] 
        }
      },      
      "geometry":{"type":"MultiPolygon",
          "coordinates":[[[[33.5461,33.44],[33.441,33.447],[33.6718,33.448],[33.0188,33.441],[33.5461,33.44]]]]}
    }
  ]
}

结果，我得到了一个具有点几何形状(44.3、33.3)的对象，而不是多边形对象。

如何忽略要素属性或其他复杂字段中的几何图形？

使用geotools gt-geojsondatastore 19.0版本。

GeoJSONDataStore geoJSONDataStore = new GeoJSONDataStore(jsonFile.toURI().toURL());
SimpleFeature simpleFeature = geoJSONDataStore.getFeatures()...next();
Point geometry = simpleFeature.getDefaultGeometry()

Answer 1

在您的构建器中，您已将默认几何图形设置为指向 other_geom，即。 Point 对象类型。将其设置为 MultiPolygon 类型(geometry)。

SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
builder.setDefaultGeometry("geometry");

在你的提取中

MultiPolygon geometry = simpleFeature.getDefaultGeometry();