I am new to Therion and as far as I know the only one in Greece currently trying to use it. This is my first attempt to use it for real data from a larger cave. I have many friends here in the Greek topo community waiting for me to learn how to use Therion well enough to pass on the knowledge. I have many questions which I will be asking over the course of time.
At 14:51 16/11/2007, you wrote: >Quoting Stelios Zacharias <stelios.zacharias at selas.org>: > > The cave is split into two scraps, although I do not think this is > > causing the problem. The first difficulty is the appearance of a > > shadow passage, in the south and west of the diagram. The passage > > should be in the blue zone for depth, but there is a high echo and a > > sloping line unconnected to either the high echo or the actual > > passage. The scrap border is at the meeting point of the three. > >This is because there are no survey stations with known Z coordinate in these >parts of your scraps - therefore therion is not able to determine >"altitude" of >these parts and they are therefore in some average scrap altitude (obviously >wrong in this case). If you will add station points with >corresponding names to >your scraps, they should be placed in correct altitude. OK - the passage in question was done by diving, and was never yet surveyed. I will have to make up some survey points and include them for the loch image over the next few days. If this fixes the problem I will re-post. > > The other problem concerns spikes either upwards or downwards which > > appear usually in chambers. Two examples of this might be seen at the > > far eastern end of the survey. > >Hmmm, this is a known bug, that happens if single scrap goes over multiple >altitude levels. Splitting cave into multiple scraps within single altitude >level usually helps in this case, but it is still a bug that needs >to be fixed. When you write altitude levels, how do you mean - the whole cave only has 160m in it, how many scraps should that be split into? There is one case of spiking to the south where a passage at -40m is trying to reach the surface, the cases at the far east, where some of the lowest chambers are growing upwards, a case of a downward spike in the northern route a little after the level section in cyan, and a few others here and there. > > If the .th and .th2 files are needed for investigation, I would be > > happy to send them. > >This would help me to find out, where the problem is. Last time I >was trying to >fix this on Wookey's 80km mulu scrap and obviously - this was not possible. So >some small cave where it appears is welcome. .th and .th2 files attached. I am not sure about how simple their syntax is - it is my first time with multiple scraps, and I know my first .th2 has very badly drawn bezier curves, but I am learning still :) Many thanks for your time. Stelios -------------- next part -------------- A non-text attachment was scrubbed... Name: dersios-therion.zip Type: application/octet-stream Size: 26211 bytes Desc: not available URL: <http://mailman.speleo.sk/pipermail/therion/attachments/20071116/ead4354d/attachment.obj>
