Method ExtractGeoJSONFeatureGeometry

IO/GeoJSON/vtkGeoJSONFeature.cxx:375–434

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//------------------------------------------------------------------------------
void vtkGeoJSONFeature::ExtractGeoJSONFeatureGeometry(
  const Json::Value& geometryRoot, vtkPolyData* outputData)
{
  // Check for geometry-type node
  Json::Value const& geometryTypeNode = geometryRoot["type"];
  if (geometryTypeNode.isNull())
  {
    vtkErrorMacro(<< "Missing geometry-type node");
    return;
  }
  if (!geometryTypeNode.isString())
  {
    vtkErrorMacro(<< "Invalid geometry-type node");
    return;
  }

  std::string typeString = geometryTypeNode.asString();
  if (typeString == GeoJSON_GEOMETRY_COLLECTION)
  {
    // For GeometryCollection
    const Json::Value& geometries = geometryRoot["geometries"];
    for (Json::Value::ArrayIndex i = 0; i < geometries.size(); i++)
    {
      const Json::Value& child = geometries[i];
      this->ExtractGeoJSONFeatureGeometry(child, outputData);
    }
    return;
  }

  // (else)
  Json::Value const& coordinates = geometryRoot["coordinates"];
  if (typeString == GeoJSON_POINT)
  {
    this->ExtractPoint(coordinates, outputData);
  }
  else if (typeString == GeoJSON_MULTI_POINT)
  {
    this->ExtractMultiPoint(coordinates, outputData);
  }
  else if (typeString == GeoJSON_LINE_STRING)
  {
    this->ExtractLineString(coordinates, outputData);
  }
  else if (typeString == GeoJSON_MULTI_LINE_STRING)
  {
    this->ExtractMultiLineString(coordinates, outputData);
  }
  else if (typeString == GeoJSON_POLYGON)
  {
    this->ExtractPolygon(coordinates, outputData);
  }
  else if (typeString == GeoJSON_MULTI_POLYGON)
  {
    this->ExtractMultiPolygon(coordinates, outputData);
  }
  else
  {
    vtkErrorMacro(<< "Unknown or unsupported geometry type " << geometryTypeNode);