Unless, of course, those are clues? From the FAQ on Elonka's page:
Q: Why are words misspelled in Parts 1 and 2? Is that a mistake?
No. Sanborn has said that those two errors -- iqlusion and undergruund -- are deliberate, but he didn't say exactly why. He did say that it wasn't what they were that was so important, as their orientation or positioning.
If there's something critical about their positioning, and given that the coordinates are for a location in the same courtyard as the sculpture, it seems reasonable that one would need more than just the ciphertext to solve it.
Q: Why are words misspelled in Parts 1 and 2? Is that a mistake?
No. Sanborn has said that those two errors -- iqlusion and undergruund -- are deliberate, but he didn't say exactly why. He did say that it wasn't what they were that was so important, as their orientation or positioning.
If there's something critical about their positioning, and given that the coordinates are for a location in the same courtyard as the sculpture, it seems reasonable that one would need more than just the ciphertext to solve it.