I’ve fixed this for the places in the Northeastern region where I did this. 4 cities and 21 towns are now marked with “place=city” and “place=town” according to Wikipedia: List of Cities in Thailand.
The proposals how to mark capitals of a region seem to be stuck: Proposed features/capital and Talk:Relations/Proposed/Region.
To keep the information which places are the capitals of a Changwat, an Amphoe or a Tambon which I had hidden in the place tag I invented and established the tag “capital_level” which I will use until there’s an accepted solution. The same numbers as for Administrative levels are used:
-
“capital_level=4” marks the capital of a Changwat
-
“capital_level=6” marks the capital of an Amphoe
-
“capital_level=8” marks the capital of a Tambon