Many of the guides published on paper or the internet end up out of date very quickly. That's probably due to the short life of many businesses. Sometimes combined with people losing interest in maintaining their website or publication.

Google Maps can be better, however even they foul it up. For instance, Panorama is showing as temporarily closed. I suggested an edit, including a photo of it open, taken on my Android device. Google even ought to be able to detect that customers like me have used the bar from their phones. They still have not changed the status to open. Whether or not they accept my edits seems to follow some kind of random process.

There are also strange examples of businesses moving location and not updating Google maps. e.g. C and B barbers moved from Thaniya to Patpong. They didn't update their location and eventually I did it for them.