7. 1. 2015 v 19:41, Bruce <bruce at tomo.co.nz>:

> So what it is looking like, if the contributory maps are all derived from 
> scraps (or maps in turn derived from scraps), then the altitude range is 
> correct.
> But if there is a map that is centerline derived (ie has no scraps) then the 
> altitude minima is set to zero.
> 

Only one question: do you have defined entrance?

m.
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