Geocodes for Galyani Vadhana district

Three months after the district Galyani Vadhana was officially created, the list of codes for the administrative entities was updated accordingly. Though a code for the district was already assigned around 1997 when the district then-named Wat Chan (กิ่งอำเภอวัดจันทร์) was in process of being created, but then abandoned due to the Asian financial crisis. Since Galyani Vadhana district covers exactly the same area as this abandoned minor district, it was only sensible to use the old number 5026 - but for whatever reason DOPA chose 5025 instead, which was in the past assigned to a planned district Wiang Kham (กิ่งอำเภอเวียงคำ). The order of the three subdistricts (Tambon) wasn't possible to know before either, but since it followed the same order as they were mentioned in most new reports I had guessed these numbers correctly.

Code	Name		Old code
502501	บ้านจันทร์	Ban Chan	500306
502502	แม่แดด	Mae Daet	500309
502503	แจ่มหลวง	Chaem Luang	500310

The geocode table from DOPA does not include the villages (Muban), however since I don't think there was any renumbering of the villages within the subdistricts, the codes for them should be easy to guess. So for reference here is the full list of administrative villages in the district.

Subdistrict	Muban	Name		Code
Ban Chan	1	บ้านห้วยฮ่อม	Ban Huai Hom	50250101
	2	บ้านสันม่วง	Ban San Muang	50250102
	3	บ้านวัดจันทร์	Ban Wat Chan	50250103
	4	บ้านหนองเจ็ดหน่วย	Ban Nong Chet Nuai	50250104
	5	บ้านแจ่มน้อย	Ban Chaem Noi	50250105
	6	บ้านหนองแดง	Ban Nong Daeng	50250106
	7	บ้านเด่น	Ban Den	50250107
Mae Daet	1	บ้านแม่ผาปู	Ban Mae Pha Pu	50250201
	2	บ้านแม่ตะละ1	Ban Mae Tala	50250202
	3	บ้านแม่ตะละใต้	Ban Mae Tala Tai	50250203
	4	บ้านแม่แดดน้อย	Ban Mae Daed Noi	50250204
	5	บ้านห้วยปู	Ban Huai Pu	50250205
	6	บ้านดงสามหมื่น	Ban Dong Sam Muen	50250206
	7	บ้านแม่ตะละม้ง	Ban Mae Tala Mang	50250207
Chaem Luang	1	บ้านขุนแม่รวม	Ban Khun Mae Ruam	50250301
	2	บ้านกิ่วโป่ง	Ban Kio Pong	50250302
	3	บ้านแม่ละอุป2	Ban Mae La-up	50250303
	4	บ้านห้วยยา	Ban Huai Ya	50250304
	5	บ้านห้วยเขียดแห้ง	Ban Huai Khiat Haeng	50250305
	6	บ้านแจ่มหลวง	Ban Chaem Luang	50250306
	7	บ้านเสาแดง	Ban Sao Daeng	50250307

¹ In some sources listed as บ้านแม่ตะละเหนือ (Ban Mae Tala Nuea)
² Spelled แม่ละอูบ at DOPA, แม่ละอุป at TAO

The interesting question is why they did not choose 5026 as the code for the district. When in 2006 the district Wiang Kao (อำเภอเวียงเก่า) in Khon Kaen received the code 4029, since the codes 4026 to 4028 were assigned to planned districts abandoned in 1997, same as for Chiang Mai the numbers 5025 to 5028. I tried to send an email to DOPA in the vain hope of getting an explanation, but as usual - no reply.