[OSM-talk] Mapping and surveying long road tunnels

Raphaël Jacquot sxpert at sxpert.org
Thu Mar 22 14:45:36 GMT 2007

Robert Hart a écrit :
>      You can't use any published map sources that you
>     consider reliable as it is too new for o-o-cop maps.
>     Any thoughts?
> I guess the options are persuade the designers/contractor to provide a
> drawing or other data, that can be used, or getting out the theodolite.
> For a slightly less accurate approach (afterall, I hope nobody is going
> to try and do any groundworks based on our data - so who cares), you
> could try taking bearings with a compass at regular intervals. It might
> depend on how the tunnel is lined whether the compass works. Blackadder
> might know.

or, we could use IMUs and some kalmann filtering


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