Re: [Therion] vthreshold

15.05.2012 18:43, Xavier Pennec написал:

I completely agree with you that NSEW is not not a good way to measure the shape of about-vertical passages. In fact I personally never measure dimensions in NSEW directions but in the direction of the shot (or of the preceeding shot if it is absolutely vertical), in the reverse direction, on its right and on its left. I use LRUD with Up meaning in the (horizontal direction of the shot and Down the opposite. We a use "forward" and "backward" measurements in addition to LRUD. It is common practice for our surveyors.

-- WBR, Vasily