In the map below is always the current version, which at the time of writing includes
- Province halls (blue marker), 65 out of 75
- District offices (green marker), 591 out of 927 (including those in Bangkok)
- PAO offices (red marker), 10 out of 75
- TAO (white marker), 74 out of 2105
- Municipalities (yellow marker), 99 out of 5671
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Quite obviously the coordinates are for from complete - for the district offices I have locations for all and only omitted those where Google Earth has no hires data yet to verify the accurate location. But especially for the municipalities and TAO these are quite difficult to find - some are from WikiMapia, for Samut Prakan Richard Barrow collected a few, rarely the website of the local government unit has a decent map which allows the identification in Google Earth.
So I can only call everyone interested to help making this collection more complete. You can send me any addition or correction by email, or if you have a lot and don't mind the XML editing you can join in the coding project and edit the XML yourself.