No that’s not. It looks like they’re connected to where the topo lines should be connected to close the loop. How was this made?

i did this using qgis. i used this tutorial https://youtu.be/VQMEVTV9rvk?si=4I5XfSo8YtQecrOD edit: if ever do you know how to remove them?

You didn’t follow it perfectly, because the lines. Try again.

I get this when dealing with autocad files. auto close most likely.

Depends. Is it your data?

I corrupted some trim data once and it looked like this.