====== 3.1.2.3- DATE, DECLINATION AND OTHERS ======



You can add other specification lines to your centerline data. In fact,
you should specify (at least) date, declination, team members and data
style-order. Add units lines if not using degress and meters default.
Precission surveyers should have sd (standard deviation) and calibrate
lines to fine-tune their instruments, etc. Again, for a complete list and
description of available lines, you should read thbook.pdf. 

If you are going to have more than one survey, it would be better to have
declination specified on survey, not in centerline. This leads to automatic 
calculation of declination. More on this later. 

Here is an usual plain-caver .th file. It's the same template.th file you
can find in "Examples" directory, without comments: You should edit FOO
parts, etc, to suit your needs. Note this is for 400º compass and 360º
clino. LRUD data is used.


  survey FOO -title "FOO Cave"
    centerline
    date YYYY.MM.DD
    declination -3 degrees
    team "Firstname Lastname"
    team "Firstname Lastname" # add as many team lines as you need
    units compass grad
    data normal from to length compass clino left right up down
  
    (survey data here)
  
    endcenterline
  endsurvey