Garmin has produced street level mapping for Thailand with points of interest such as lodging, restaurants, and transit (for example, small town bus stations)and ships it on a microSD in an SD adapter. I got version 8.
Some initial comments:
the serial number isn't evident, if it has one at all
when used with a nuvi, it doesn't show 3D maps
detail in small towns is pretty good, though there are some misspellings