Split surface with inner curve and dispatch left over

Grasshopper
,
1

Hi all,

I believe I’ve done it years ago… but all in the sudden just forgot how to do it…
The curves are roads and the surface is ground.
The aim is to separate roads and street block into 2 lists.

SITE SPLIT.gh (11.0 KB)

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2

Are you trying like this?

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3

@sajesh_pj
Yes sir, but what index should it be for split list?

4

Index : 1

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5

@sajesh_pj
Thanks, yet here’s another one. What if there’s additional?

SITE SPLIT 2.gh (18.7 KB)

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image1541×642 64.8 KB

6

Try to come up with a set of rules (written in english) that will make a good selection of the surfaces.
Keep in mind that those set of rules would need to work on all your cases (if not possible, we would have to detect the cases and have different sets for each, but that’s too far for now).

Then we will be able to help you with techniques to filter.