[OSM-talk] Mapping and surveying long road tunnels

[Simon Hewison]

Raphaël Jacquot wrote:
> or, we could use IMUs and some kalmann filtering

or video surveying. Marking key points on video frames from twin video 
cameras (stereo vision) with the same focal length will get you a distance 
of point on edge of tunnel from point of view. Couple with a distance 
measurement from wheel counter and you have a quite clever system.

This is partly what those geospatialvision and the amazon mechanical turk 
slaves do.

-- 
Simon Hewison