>I have a junction between a scrap in one survey and two scraps in another. No matter which way I try to sort the joins, nonsense results. Is there a more specific way of joining lines that just specifying scraps?

Graeme

Yes, when the ‘simple’ join syntax fails you need to give each line you want to join a unique id (look in the Xtherion window pane on the right hand side).  It requires a bit more concentration, but it works well.

From the therion book…

‘join’

Description: Join works in two modes: it joins either two scraps or two or more points

or lines in a map together.

When joining more than two points or lines <at the same point>, use one join command for all of them, not a sequence of join commands for pairs.

When joining scraps, only passage walls are joined. It’s a good idea to place a scrap join

in the passage which is as simple as possible, otherwise you have to specify join for each

pair of objects which should be joined <this is what you have found Graeme>.

Syntax: join <point1> <point2> ... <pointN> [OPTIONS]

Context: none, scrap, survey

Arguments:

• <pointX> can be an ID of a point or line symbol, optionally followed by a line point

mark <id>:<mark> (e.g. podangl_l31@podangl:mark1). <mark> can be also ‘end’ (end

of the line) or line point index (where 0 is the first point).

A special case is when <point1> and <point2> are scrap IDs—than the closest scrap

ends are joined together.

Options:

• smooth <on/off> indicates whether two lines are to be connected smoothly.

• count <N> (when used with scraps) ◃ Therion will try to join scraps which connect in

N locations/passages.

You can find some more discussion here http://search.gmane.org/?query=join+scrap&group=gmane.comp.gis.therion

Bruce