Whatever it is would mean the end result will be much higher than 7 deer per square mile killed......if that isn't enough then I can't imagine what would be.
I think I know what they're saying, Chad... They're saying unhuntable land in that it's land you can't hunt but the deer can still occupy, i.e. deer that pretty much can't be killed. I'm guessing there isn't much of that in Washington County, but I could be wrong. But, what Chad is saying, guys, is that if you subtract the actual hardscapes from the total county acreage (roads, parking lots, buildings, etc) then that would make the deer density greater. There probably isn't much of that down there either, so those two probably almost cancel out. Almost 7 deer killed per square mile does seem like quite a few, but I'm sure the same argument applies that "if there's 10 you can kill 4, if there's 4 you can still kill 4."
BTW, in high-quality habitat (like most of Ohio), I think carrying capacity for deer is over 20 per sq. mile. In urban areas and fenced in areas (NASA Plumbrook, Ravenna arsenal) it's not uncommon for densities to approach 100 or more per square mile. NASA Plumbrook is the only place I've been in Ohio where I've truly seen the effects of a deer population at or above the carrying capacity of the land.