Sorry, I've forgotten at this point! But I know that specifically, the scale scores were almost all 0/2, but most of my position and rotation ones were 2/2. Getting the scale correct on any perimeter landmarks was definitely easier because you just had to line things up with the map's drawn lines.
Maybe something like this would be a bit easier if there were grid lines or something similar to help show how proportionate everything is? I know that would kind of defeat the purpose though, and isn't very pirate-y, so maybe not that specifically!