Quantity List doesn't contain fromdepth or todepth. But only depth. Btw with "calibrate depth 0 -1" there is no error while compiling.
> Martin Sluka via Therion <[email protected]> hat am 30.09.2021 14:08 > geschrieben: > > > But you use fromdepth and todepth as quantity. Shouldn’t it be calibrate > fromdepth todepth 4 -1 ? > > Martin S. > > > > > 30. 9. 2021 v 12:59, Torsten Schnitter > <[email protected] mailto:[email protected] >: > > > > Due to the different waterlevel there is a difference of 4.0m in > > depth readings. > > To correct this I used "calibrate depth 4 -1" within the resurvey > > data. > > > > > > From Therionbook: > > calibrate <quantity list> <zero error> [<scale>] . set the instrument > calibration. > The measured value is calculated using the following formula: measured > value = > (read value - zero error) x scale. The supported quantities are the same > as sd. > > From Survex manual: > > > 4.5.3. CALIBRATE > > Syntax > *calibrate <quantity list> <zero error> [<scale>] *calibrate <quantity > list> <zero error> <units> [<scale>] *calibrate default > > Example > > *calibrate tape +0.3 > > Description > > *calibrate is used to specify instrument calibrations, via a zero error > and a scale factor. By default, the zero error is 0.0 and the scale factor > 1.0 for all quantities. > > <quantity> is one of TAPE|COMPASS|CLINO|COUNTER|DEPTH|DECLINATION|X|Y|Z > > Several quantities can be given in <quantity list> - the specified > calibration will be applied to each of them. > > You need to be careful about the sign of the ZeroError. Survex follows > the convention used with scientific instruments - the ZeroError is what the > instrument reads when measuring a reading which should be zero. So for > example, if your tape measure has the end missing, and you are using the 30cm > mark to take all measurements from, then a zero distance would be measured as > 30cm and you would correct this with: > > *CALIBRATE tape +0.3 > > If you tape was too long, starting at -20cm (it does happen!) then you > can correct it with: > > *CALIBRATE tape -0.2 > > Note: ZeroError is irrelevant for Topofil counters and depth gauges since > pairs of readings are subtracted. > > In the first form in the synopsis above, the zero error is measured by > the instrument itself (e.g. reading off the number where a truncated tape now > ends) and any scale factor specified applies to it, like so: > > Value = ( Reading - ZeroError ) * Scale (Scale defaults to 1.0) > > In the second form above (supported since Survex 1.2.21), the zero error > has been measured externally (e.g. measuring how much too long your tape is > with a ruler) - the units of the zero error are explicitly specified and any > scale factor isn’t applied to it: > > Value = ( Reading * Scale ) - ZeroError (Scale defaults to 1.0) > > If the scale factor is 1.0, then the two forms are equivalent, though > they still allow you to differentiate between how the zero error has been > determined. > > With older Survex versions, you would specify the magnetic declination > (difference between True North and Magnetic North) by using *calibrate > declination to set an explicit value (with no scale factor allowed). Since > Survex 1.2.22, it’s recommended to instead use the new *declination command > instead - see the documentation of that command for more details. > > _______________________________________________ > Therion mailing list > [email protected] > https://mailman.speleo.sk/listinfo/therion >
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