I wonder if, at some time in the past, some cartographer examining a satellite image saw something that looked like a long sandy island and labelled it "sandy i

I wonder if, at some time in the past, some cartographer examining a satellite image saw something that looked like a long sandy island and labelled it "sandy island" as a provisional description rather than a name, intending to get back to it. But they never did, and the description became a name.