[mkgmap-dev] Option --remove-short-arcs

Wed Aug 12 15:12:20 BST 2009

Hi Steve,

> On 12/08/09 11:23, Mark Burton wrote:
> > I believe that the mimimum distance will depend on lat/lon because the
> > real constraint is that the source and target nodes must not have the
> > same coordinates (resolution being 360 deg / 2^24)
> 
> Are you sure that is the real constraint?

Nope.

> The 5.4m value is widely known and used by everyone else in
> the Garmin map making communities, so it sees unwise to ignore
> it.
> 
> So OK, we do not know where this number comes from.  The best
> speculation was from Alex who notes that it is close (within 10%)
> of the minimum length that can be encoded into RouteArc.lenth
> Since the conversion factor from meters/feet is empirically
> determined, it could be incorrect by a few percent anyway.

Well, I don't mind. Would you like the default min arc length be 5.4m
rather than 0? Easily done.

Cheers,

Mark