Hi Larry-

 

Well, I do have a question about the Tape Correction field in the survey editor, as I just had an opportunity to use it this week; we broke our tape(at the 0.4 foot mark) on the first shot of a survey.  We recorded the distance data in the book as we read it- i.e., we didn't correct for the missing bit of tape.

 

When I entered the data, I entered 0.4 in the Tape Correction field, and entered our uncorrected distances in the "Tape" column of the data entry field.

 

So here's where I'm confused.

 

In your Cave Editor documentation, you state:

 

 

This may be a math word problem I just can't grasp, but as I see it, if I measure my height with an unbroken tape, I'd be 6.0 feet tall.  If the tape broke at the 1.0 foot mark, I'd read the tape as 7.0 feet.  I would want the correction factor to be subtracted from the 7.0 foot reading, not added, yes?

 

In addition- with a Tape Correction factor of 0.4(positive) entered in the survey file, the Cave Statistics shows a surveyed length that is more than the sum of the uncorrected taped distances in my survey notes.  If I change the TC to -0.4 feet, then I get a length more in line with what my scratch paper math indicates would be the correct surveyed length:

 

Tape Correction = -0.4'; Total Surveyed = 413.7'

 

Tape Correction =     0; Total Surveyed = 419.7'

 

Tape Correction = +0.4'; Total Surveyed = 425.7' 

 

FYI- I'm using COMPASS editor version 5.05.10.18.47

 

Thanks!  jl