This map of the station platform is posted in one of the public areas (where one might be waiting for a train) of one of Singapore’s MRT stations:
Ok, I could see why someone might want to see this. However, it is just if the platoform setup itself, so it shows stairs and elevators, but no shops or other directory information.
Closer inspection reveals the legend is showing the various loads supported by different parts of the platform. now I wonder why this sign was put up in the general public portion of the station, when it seems like it was directly targeted at engineers or construction workers that might be on site.