Thanks for taking a look into this, Scott. It’s much appreciated!
Jeollanam-do
The 22 Admin Level 2 places looks correct.
Incheon
The Admin Level 2 “Nam” (District) was renamed to “Michuhol” (District) in July 2018 but otherwise looks good.
Busan
The Admin Level 2 “Jung” (District) appears to be missing.
Chungcheongbuk-do
The 12 Admin Level 2 places look correct.
Seoul
The 25 Admin Level 2 places are correct but “Gandong” should be “Gangdong”. To the best of my knowledge, “Jongro” is typically transliterated as “Jongno” these days but that’s a smaller issue. I’m not sure why hyphens are used for some places (Geum-cheon, Dong-daemun, Eun-pyeong, Gwang-jin) and not others since Jung is the only place in the list that is only one syllable. For the sake of consistency, I would suggest removing hyphens from all of those places.
Ulsan
The 5 Admin Level 2 places look correct.
Daejeon
The 5 Admin Level 2 places look correct.
Daegu
The 8 Admin Level 2 places look correct.
Gangwon-do
The 18 Admin Level 2 places look correct.
Jeju
The 2 Admin Level 2 place looks correct.
Jeollabuk-do
The 14 Admin Level 2 places look correct.
Gwangju
“Dong”, “Gwangsan”, and “Buk” are correct but the list is also missing the Admin Level 2 places “Nam” and “Seo”.
Chungcheongnam-do
The 15 Admin Level 2 places look correct.
Gyeongsangnam-do
“Jinhae” and “Masan” were incorporated into Changwon in 2010 so should be combined with “Changwon” instead of being Admin Level 2 places in their own right.
Gyeonggi-do
“Ansoeng” should be “Anseong” but otherwise the 31 Admin Level 2 places look correct.
Gyeongsangbuk-do
The 23 Admin Level 2 places look correct.
Sejong
From what I can tell it looks like Sejong should have 19 Admin Level 2 places within it. The city’s official webpage - https://www.sejong.go.kr/eng/sub01_02_02.do - lists that many (near the bottom of the page). Sejong (Admin Level 1) city was only created in 2012 so I imagine the discrepancy is from the administrative divisions being redrawn since GADM’s last update.
Admin Level 1 looks good, I’ve added comments about the Admin Level 2 places. As for getting the data, I honestly don’t know what would be a good centralized and official location to receive the most up-to-date data. Things like the merger between Changwon, Masan, and Jinhae into “Changwon” and the creation of “Sejong” city was reported in the news here. The list on Wikipedia - https://en.wikipedia.org/wiki/Administrative_divisions_of_South_Korea#Provincial-level_divisions - looks accurate though I don’t know if iNaturalist would want to rely on it or how easily that information could be applied to any potential updates to Admin Level places.
