The other polytechnic in Singapore which hosts Newcastle students is Nanyang and I visited the Library there on Thursday. It has a similar size book stock to Ngee Ann, about 200k, but a smaller floor area.
I was very impressed with their 3D interactive guide. It displays on a large touch screen in the library entrance. Students can search for a book in the catalogue, click on Guide me and are shown a route from the screen to the bookshelf.
It's very clever and easy to use.