newcastle is too large - and that is part of its attraction ( but usually its people who don t need to RP in newcastle on a daily base for whom it is an attraction to be so large )
i think going from the lower left to the upper right corner is well outside the measurable distance ( it displays "far" ) - and probably is something like 200k
cutting it down by 50% altogether however should not be done. - what CAN be done is to scale down the "civilized" part by 50% - and leave the ancient minefield and the nomad city waaaay off the civilized part.
by a feeling - a "long" distance to cruise should not exceed 100k by much ( thats around the distance from omega-41 jh in 74 to the omega-49 jumphole... and takes around 10 minutes or a little less. ) - much more and it gets from a long distance to an annoying distance, which isn t good cause on very long cruise routes - nothing much happens. - a pirate cannot just sit in the middle of nowhere waiting for a target - and a trader can only twiddle his thumbs while he s cruising there.