For most people understanding which mkgmap options they should choose, is not easy - as one first needs to have quite thorough understanding. I think in general useful options should be the default - and not stick for ages to old behavior. I'm afraid I make to many mistakes if I change it myself, but I would propose the following default option changes:


changes that only need a default change because one can disable them by setting the value to 0
--reduce-point-density=5.4
--remove-short-arcs=2.8
--location-autofill=1

option needs to able to be switched off
--generate-sea=extend-sea-sectors,close-gaps=6000 (including this by default, may keep people more aware of coastline nondestruction)

options that would need to be reversed
--supress-dead-end-nodes
--adjust-turn-headings
--add-pois-to-areas (this seems to be the default behaviour of most renderers now)
--ignore-maxspeeds (the current handling sucks, If we would change this to become default, I would be willing to rework the default style to make use of sensible maxspeeds)
--route (the default style is routable, hence the default map should be routable too)