[Therion] Main route through a cave

[Tarquin Wilton-Jones]

On 13/06/2021 12:17, Axel wrote:
> an additional thought just occoured to me:
> If u draw a mainroute-line wouldn't it be possible for the coding-gurus
> to get the length and maybe the altitude difference of that line type?

I would have thought the easier way would be a "flags" switch that could
do it for you. "flags mainroute". It wouldn't even be an estimate. Maybe
some of the Survex folks on this list could shed some light on how
feasible that would be. Might require a Survex modification though.