Capture the point of the existing polygon

[sxxin]

I'm working for semantic segmentation of remote sensing. There is such a situation that the different polygons of classes always have the collective line in the satellite imagery.

I want to annotate the new polygon by capturing the collective line to reduce the workload. I wonder if labelme tool has this kind of function.

Thanks sir!

[wkentaro]

Please drop examples. I'm not sure what do you mean by "collective line in satellite imagery".

[sxxin]

For example, the beach and the ocean are adjacent in space and the collective line is the coastline.

However, the coastline is tortuous. If I have already annotated the beach, I hope to capture the endpoints of the coastline so that I can reduce the workload when I annotate the ocean.

[wkentaro]

I see. The current solution would be duplicating one of the polygons and removing points that are not on the border.

[sxxin]

That's a great solution! Thanks!