[mkgmap-dev] Routing and tunnels

Tue Dec 11 19:51:15 GMT 2012

Thanks guys (especially Minko for the second useful e-mail in a week), I now 
have my maps not only routable, but as I wish to see them as well. Charlie, 
your web site was one of the ones that got me into making my own maps, 
thanks for the inspiration.

Cheers, Geoff.

-----Original Message----- 
From: Minko
Sent: Tuesday, December 11, 2012 6:18 PM
To: Development list for mkgmap
Subject: Re: [mkgmap-dev] Routing and tunnels

> Thanks Minko, I guess that is why the bridge worked - it was always an
> overlay. Is there anywhere to say which codes are routeable, or is it
> try it and see (I guess it needs to be a low number).

As far as I know only these are routable (except 0x14?)

R Hex    Description
Y 0x01 1 Major Highway-thick
Y 0x02 2 Principal Highway-thick
Y 0x03 3 Principal Highway-medium
Y 0x04 4 Arterial Road–medium
Y 0x05 5 Arterial Road-thick
Y 0x06 6 Road-thin
Y 0x07 7 Alley-thick
Y 0x08 8 Ramp
Y 0x09 9 Ramp
Y 0x0a 10 Unpaved Road-thin
Y 0x0b 11 Major Highway Connector-thick
Y 0x0c 12 Roundabout
N 0x14 20 Railroad
Y 0x16 22 Track/Trail
Y 0x1a 26 Ferry
Y 0x1b 27 Ferry

So you can also pick one of the routable lines you don't need and use it for 
tunnels.
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