According the the MOE website:
Like most Singaporeans, I didn't want to pay first so I called up a particular school to ask if I stayed within 1km of it. I was told to draw a 1km radius on a map to check. I thought that it was kind of weird, but I tried anyway.Q23: How can I find out the actual distance between my school of choice and my residence?
A23: Parents may check with the schools directly on the distance between their home and the schools. Alternatively, you may visit Singapore Land Authority’s Integrated Land Information Service for a list of schools within 1km and 2km of your address. This is not an MOE website and is maintained by the Singapore Land Authority. You would have to pay for the use of this service.
Using different points of the school on the map, the distance ranged from 0.9km to 1.1km.
IF I decide pay for the SLA service, will the distance calculated be officially recognised and used in the balloting process?
Thanks in advance!