[Therion] standard deviation and survey grade

2008-11-24 Thread Martin Budaj
> What about 'position'?  I don't think the BCRA grades have much to say about
> these.  (I'm sure we can make something sensible up)

First proposal could be:

GRADE; POSITION / HEIGHT error (95% confidence); comment

0 -- position unknown
1  1000 m -- rough estimate / memory
2  100 m  -- GPS in bad conditions (canyons, foliage, SA), small-scale map
3  15 / 45 m  -- GPS, large-scale map
4  5 / 15 m   -- GPS longer observation, distinct features on a large-scale map
5  1 / 3 m-- GIS GPS
6  15 cm  -- geodetic GPS, theodolite/total station, technical nivelation
7  5 cm   -- geodetic GPS, precise theodolite/total station,
precise nivelation

Martin



[Therion] Passage Height units

2008-11-24 Thread Martin Budaj
We are also considering to allow direct entering of lengths in feet
and inches like 5'3" or 3" (which would be interpreted always as
feet/inches regardless of default length units setting).

It would simplify code like -value [3 ft] into -value 3'.

Any comments on this? How to enter fractions of an inch?

Martin

On Thu, Nov 20, 2008 at 2:23 PM, Stacho Mudrak  wrote:
>> May I suggest an extension of the idea?  In the master .th file should be 
>> some
>> way of specifying a default for scraps.  If the scrap contains a default
>> setting, it over-rides the setting from the .th file.
>
> If it would be specified in master file, than if you will send
> somebody a part of your data without this master file, he could not be
> sure, what units did you used. But you are right - units specification
> for every scrap is still not very convenient... I can imagine.
>
> I have another suggestion. What about setting defult units system
> simmilar way as file character encoding is set. E.g. at the beginning
> of every file you will have command, that will set default units valid
> until end of file. This command will be automatically inserted by
> xtherion each time you create new .th or .th2 file. You will be able
> to configure default units in xtherion.ini, so you will not have to
> take care of units any more. And the data will be still portable,
> because units used in file will be specified in its header. It will
> also simplify centerline insertion, because units specification after
> each centerline command will not be needed any more.
>
> Regards, S.
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