Trawling through the Covenant Blu-ray again last night and stumbled across this. About 1 hour 39 or so, just after the Lifter flies away from the city we see this birds eye shot of the Covenant. Of particular note are the shapes on the surface at the bottom of the frame.
More photos taken with mobile phone camera I’m afraid, so I’ve highlighted the relevant bits.
It almost appears as if there’s a letter ‘I’ in there.
Another city, or something akin to Nazca? Either way God still don’t build in straight lines.