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@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