Torsten To phrase it differently to Martin, I think of it this way... xvi files are outputs, generated by Therion, so they will change according to changes in the survey network data, loop closures etc.
th2 files are inputs, created by the draughtsperson using Xtherion or using a text editor. Even though the th2 file may reference xvi files, the th2 file is never changed by therion, so th2 files are never affected by subsequent changes to the survey network. There are probably many work flows, but the one I use assumes a constantly evolving survey network. Each survey trip has its own .th file(s), xvi file(s) and .th2 file(s). Each one is uniquely named and is never substantially changed, even though subsequent discoveries and surveys will alter the shape of the survey network and sometimes the drawing local to some survey stations. Of course if a new passage is discovered branching off a previously surveyed passage, then the old th2 file will require a minor edit to create a gap in the walls to accommodate the new passage. Otherwise, the new survey and drawings are entirely described in a new set of files. As an example my current project has about 120 sets of files for about 20km of survey length. -----Original Message----- ... >1st question: >How do you draw the walls from this new sidetunnel and connect it correctly to the existing drawings? >Do you work with the old .xvi or the new .xvi file? >Do you use a new scrap and work with joins for the wall drawings? To edit the old passage detail you will use the old th2 file, and it will naturally already reference the old xvi file (not that it matters, as you will look at the pdf output to see how the old and new match up, before invoking a scrap join statement). To draw the new passage you should create a new th2 file, and this will reference the new xvi file (for the new passage only). >2nd question: >Now you do more survey at the end of the cave. >In your .th2 file the old walls at there old positions. Not relevant. The walls will generally still be in the same position relative to the survey station. Therions basic functionality sorts out the morphing of the drawings to match the adjusted survey network. >But with this loop closure from above the last station of the .xvi (first of the new survey) is in a different position. >Do you use the new .xvi file and draw the new walls in a new scrap and then connect them with joins to the old survey? Yes, each corresponding survey, xvi and drawing go together. If you draw carefully, you may not need to use join statements, although if there are significant loop misclosures then joins are a good idea. Bruce
