KnowraRiauLinked fromLinked fromThe 4 pages that link to Riau, each with the reason it gives.All 4Narrower topic 1Compared with 3North SumatraCompared with: Riau shares eastern Sumatra’s trade connections but has a different provincial center.Riau ArchipelagoCompared with: The shared name often obscures that Riau and the archipelago are separate provinces.West SumatraCompared with: Riau’s eastern, lowland orientation contrasts with West Sumatra’s Indian Ocean coast and highlands.