The simple answer is that such a map would be pointless.
You are assuming a shallow area is not claimed by a country. But actually all shallow areas are claimed by countries. There are none that are open for settlement.
Examples: Kingman Reef - US Territory even though it is under water.
Spratly Islands - Claimed by China, Philippines and Vietnam
Cay Sal Bank - Owned by Bahamas
Chagos / Benares Shoals / Diego Garcia - Claimed by UK and Mauritius
The reason all shoals are claimed is that countries want the mineral resources (if any) beneath them and with the 12 mile or 200 mile limit.
So go back to your drawing board, and decide which country you want to work with - because there is not a square inch of earth that is not claimed, and most ambigious places are claimed by multiple countries. (PS - Also the moon, and maybe Mars). This discussion IS on TSI in great length in the archives.