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Extremeophile wrote:I think you're overthinking this. Nearly all cartographers just use the elevation of the station. If the cross-section dimensions are greater than the overall cave dimensions then you need to find some bigger caves to survey
driggs wrote:It is more correct to list depth/elevation consistently at floor level than at arbitrary station locations, provided you do it consistently.
driggs wrote:Subtracting the "down" measurement from your station elevation doesn't add footage to your cave any more than doing splay shots at every station would double the amount of passage in your cave. It's simply a splay shot down.
GroundquestMSA wrote:I was assuming that entering these shots into Compass (or similar) would result in them being counted as cave length. Obviously, I don't know much about that.
driggs wrote:PS: Seriously, start using Compass or Walls or Survex or Therion or anything rather than a pencil and trigonometry. The benefits are overwhelmingly numerous. Spend your time drafting, not doing 9th grade math and then re-doing all your drafting after you discover you botched a shot.
GroundquestMSA wrote:I don't understand what you are saying in the third sentence. Sure, I'm surveying very trivial caves, but I don't know what that has to do with my question. The cave I'm working on now is 1089' long, and depending on where I measure my elevations, either 30.9' or 25.4' deep. Again, it really doesn't matter, but I think the 30.9' figure is more accurate.
Extremeophile wrote:I don't think you have measurement precision of plus or minus 0.1 feet to begin with
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