I encountered a problem when importing files into Winprop, and I would like to ask you about it, the problem is like this: I am importing shp files and DXF files into Winprop is showing that the building is not recognized; The acquisition of shp files and DXF files is as follows: the shp files are generated by UAV aerial photography and then 3D reconstruction through related software to generate real-life 3D models and 3D point clouds, and then the point clouds of all objects are classified through LiDAR360 and converted into shp files; The dxf file is generated by the UAV aerial photography and then 3D reconstruction by relevant software, and the obj file is converted into a dxf file through CloudCompare