I think this Golden Orb Weaver is Trichonephila plumipes, sometimes called a Tiger Spider. Its web glows yellow, and the legs are a light orange colour, black at the joints. Big spiders are so impressive! This type is not confined to the tropics, so I hope to see more when travel to the sub-tropics.
There are some 750 different types of pandanus; I have no idea which one I was sketching! I love their aerial prop roots.