[Talk-GB] mapping tunnels

Andy Robinson Andy_J_Robinson at blueyonder.co.uk
Fri Sep 28 13:52:55 BST 2007


Thom Shannon wrote:
>Sent: 28 September 2007 1:06 PM
>Cc: talk-gb at openstreetmap.org
>Subject: Re: [Talk-GB] mapping tunnels
>
>Isn't ASN just a compass?
>

One thing to bear in mind is that many of our older tunnels that cross below
rivers were built from cast iron segmental linings which may have some fun
with a compass. Some nice shots of the Queensway tunnel construction here:
http://www.liverpoolmuseums.org.uk/maritime/archive/stewartbale/work/tunnelw
orker.asp

try the zoom for a closer look

cheers

Andy

Andy Robinson
Andy_J_Robinson at blueyonder.co.uk








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