I'm mapping oil concessions in Algeria in greyscale. There's 4 major groups (4 oil companies), each with 2 or 3 sets of regions:
Company A, granted and demanded concessions
Company B, granted and 2 kinds of demanded concessions
Company C, proposed and demanded concessions
Company D, proposed and demanded concessions
Option 1 - Followed the reference map (drafted in the early 1950s by the looks of it) in terms of area styles, albeit in greyscale rather than the original color.
Option 2 - An alternative approach, ignoring the fact that one company has 2 different kinds of demanded concessions. Companies are distinguished by the direction of the hatching, the distinction between granted/proposed and demanded is in the intensity.
I'm not happy with either to be honest. Option 1 uses different styles for the demand, which I find kinda clunky. But option 2 turns into something like dazzle camouflage and I don't find it pleasant to look at.
Any suggestions on how I can improve this (while still staying in greyscale)?