3.1.2.1- DATA STYLE AND ORDER

A bare bones .th file could be:

survey FOO -title "FOO Cave"
  centerline
  data normal from to length compass clino

  (survey data here)

  endcenterline
endsurvey 

Anything between a survey/endsurvey pair of lines is part of the same survey. A survey can have a lot of things in it, first of all, other surveys. So each survey must have a name. This allow for a hierarchical structure (more on this later). For now, the interesting thing into a survey is the centerline. It can be called centreline too. You know, not all the people is a native english speaker.

Within a centerline/endcenterline pair of lines there are a) data specification lines -units, declination, data order, etc, and b) pure survey data lines.

In this example, there is only one data specification line into the centerline: the data style-and-order line. It specifies your survey style and data order. You can change it to fit your needs.

“normal” means that you use normal style when surveying, this is, you use compass, clino and tape. If you use a topofil, change “normal” by “topofil”. If you are a diver, change “normal” by “diving” There are other styles too, see thbook.pdf for more information.

Survey data must follow same order that “data” line keywords. If you take your data in any other order (i.e. lenght is last reading on your notes) simply change keyword order. So in this case it would become:

data normal from to compass clino lenght

Or, if you take LRUD data, you could use:

data normal from to lenght compass clino left right up down

There are keywords for all needs, i.e, if you take direct and inverse readings there are keywords “backcompass” and “backclino”, etc. Or if you are a diver, you could have “depth”. Data order line can hold as many keywords as you need. For a complete list of available keywords, please see thbook.pdf