I need to create a zoning map that shows all the individual parcels within a township. However, the zoning administrator for the township is color blind so I need to make it black and white. I have 8 different zoning districts I need to show on the map. I can do probably 4 solid shades of gray before you can't distringuish them and, the way the map is currently set up, the other 4 districts are various patterns. The problem with doing patterns, however, is that they clash with the parcel lines I need to show. I've attached a PDF of the map in its current state so you can see what I mean. Does anyone have any suggestions for a map of this type or any good multi-level black and white shading schemes that work well? Thanks in advance.