Differentiating splay measures in Aven

[Olly Betts]

On Fri, Feb 07, 2020 at 01:52:31PM +0000, Wookey wrote:
> On 2020-02-07 08:43 -0500, Luc Le Blanc wrote:
> > Does the SVX format allow differentiating splay measures that reach
> > cave walls from those aimed at random details (block, stalactite,
> > etc,)?
> 
> Yes. there are three labels:
> 
> Documented here: https://survex.com/docs/manual/datafile.htm
> 'Anonymous stations'
> 
> Single separator ('.' by default)
>     An anonymous non-wall point at the end of an implicit splay.
> 
> Double separator ('..' by default)
>     An anoymous wall point at the end of an implicit splay.

Oops, that should be "anonymous" - I've just pushed a fix.

> > In my code exporting from Auriga to Survex, I see a line where splay
> > measures to cave walls use a hyphen separator while those to details
> > use a dot for the virtual station name suffix, but this line being
> > commented, I must guess someone suggested this trick but it wouldn't
> > be implemented in Survex.
> 
> The hyphen is used by pocket topo, so is quite common in datasets
> taken that way.
> 
> Survex provides an alias command so you don't have to change them all:
> 
> You can map '-' to '..' (for compatibility with data from pocket topo)
> using the command:
> *alias station - ..

I'm not clear on what exactly you currently export (with the line above
commented), but note that '-' is a valid station name in Survex, so if
your anonymous splays to walls use '-' but you don't '*alias station -
..' then all your anonymous splays in a survey will actually be legs to
the same station named '-' in that survey, which could explain:

> > an Auriga user tells me his caves renders oddly in Aven

If that isn't the problem then an example .svx file would be useful.

Cheers,
    Olly