Correct polygon definitions for DK and ASEG regions

[alberto-jj]

Summary

This PR updates polygon definitions to correct ROI labeling/plotting issues in ggseg.plot_dk() and ggseg.plot_aseg().

Fixes #6 and #7.

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What changed

Updated polygon files (data only; no code changes):

• ggseg/data/dk/superiorparietal_left
• ggseg/data/dk/superiorfrontal_left
• ggseg/data/aseg/Left-Caudate
• ggseg/data/aseg/Right-Caudate

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Verification

I visually verified the affected ROIs using plot_dk() and plot_aseg() and compared the outputs of superiorparietal, superiorfrontal, and caudate with the R implementation of ggseg. ROIs now correspond as expected.

Minimal reproducible example

import ggseg

ggseg.plot_dk(
    {'superiorparietal_left': 1.0, 'superiorparietal_right': 1.0},
    title='superiorparietal without the superiorfrontal medial polygons'
)

ggseg.plot_dk(
    {'superiorfrontal_left': 1.0, 'superiorfrontal_right': 1.0},
    title='superiorfrontal with corrected medial polygons'
)

ggseg.plot_aseg(
    {'Right-Caudate': 1.0, 'Right-Hippocampus': 1.0},
    title='Right-Caudate & Right-Hippocampus correspond'
)

ggseg.plot_aseg(
    {'Left-Caudate': 1.0, 'Left-Hippocampus': 1.0},
    title='Left-Caudate & Left-Hippocampus correspond'
)

---

[alberto-jj]

Hi @xgrg — quick ping in case this got buried in email (cc @sipv for visibility).

PR #9 is data-only (polygon definitions) and fixes the mislabeling shown in #6 (DK left superiorparietal/superiorfrontal) and #7 (aseg Left/Right-Caudate swap).
If everything looks ok, could you approve the pending workflow (if needed) and merge? Below are screenshots comparing R’s ggseg output with my fix-dk-aseg branch.

Also @xgrg: since you mentioned you’re not actively maintaining the repo, would you be comfortable adding me as a collaborator (merge rights) on python-ggseg? I have a small, backwards-compatible improvement to plot_dk()/plot_aseg() (subplot support + ROI highlighting/alpha map + extra colorbar options) that I’d love to contribute as a follow-up PR, and I’m happy to help with triage/maintenance going forward. If you’d rather keep it PR-only, totally fine.

[xgrg]

Hi @alberto-jj, sorry for the late reply. Thank you very much for this important contribution. Changes look good and were tested successfully. Merging them.