Dear Friend,
Welcome to Singapore, that map is just a guidance. You can download Singapore Civil Aviation Authority (CAAS) apps call "OneMap Singapore".
A) Touch and hold your location on your mobile screen
B) At the bottom of the screen you have 3 options, Select "Nearby"
C) Scroll down to select "Safety and Security
D) No need to select1 ~ Start to select 2) Areas within 5km of aerodromes 3) Areas within Danger Areas 4) Areas within Prohibited Areas 5) Areas within Restricted Areas 8) Protected Area under Section 7 Air Navigation Act
For tablet after each selection, the
ma turn some parts of the island blue, u shoould be able to fly your drone on those white (unshaded ares).
For mobile phone : each selction, a feedback will show negative "not retricted air space", if any one of those selection show a red dot - no fly.
As a Drone Pilot in Singapore we are also expected to observe Fly Safe Advisory, I will attached two more advisory for your information in this reply.
Have an enjoyable time in Singapore.