[silly question alert] What is this type of sketching?

Each single structure pupil I do know makes such drawings. They carry a specific sort of pointy tip pen and draw streets, on a regular basis scenes, and so forth.

What's this to do with these kinda sketches?

I do know many artists who aren't architects themselves and don't see them producing such artwork.

I’m curious to know extra.

I’ve OKAY drawing abilities. Is that this straightforward? Can I additionally do that lol?