Could you tell me which way to annotate this dataset

[Sophia-WHU]

Hello, I noticed that the JSON format of this cities_dataset is the same as the Wireframe dataset. Could you please tell me which method or software you use to annotate the pictures? Thank you very much.

[ennauata]

Hello, we developed our own annotator for annotating the polygons.

[Sophia-WHU]

Okay, thank you for your reply.