The above fix assumes the information you give is perfect, (zero error) which is unlikely/impossible. It is far better to give the possible error on the readings. *fix <station> [reference] [ <x> <y> <z> [ <x std err> <y std err> <z std err> [ <cov(x,y)> <cov(y,z)> <cov(z,x)> ] ] ] You...

Without seeing all the data, well at least the 3d, what I think is happening is that fix just puts the number, 288, in an altitude label, the 2 comes from the altitude of closest station in the dataset. Trying fixing the 288 in the data instead of the drawing. (I've not used fix in the drawing...

Assuming you are using the altitude point? If not that is probably the answer, if not I'm a little stumped about what you are asking, please could you send and example. Therion takes the altitude from the closest survey station. For this reason I tent to put the altitude point on a survey...

There should be no need to calculate the inclination for input to Therion. There are various formats that Therion can accept one of them diving. It allows input of various depths. One main advantages of survex format (that Therion essentially uses) is that it can take data in exactly the same...

Unfortunately it appears to have been hacked, well another site on the same service was used carelessly by someone and it has spread to the other sites. Wookey is aware and hopefully will clean it up soon Andrew CSG secretary

Hello There is lots of support out there, I would suggest the mailing list, which most people using therion tend to use https://therion.speleo.sk/contact.php It is a very friendly group and covers all levels from beginner to really technical changes. You will need to give a bit more detail...

Thanks for reporting this, someone is going to go and have a look at which point further discussion will take place and reported. For future reference the information that is needed to report anchors or request new ones is on this page https://cscc.org.uk/wiki/equipment/start CSCC is an...

I was intrigued by the puzzle of getting this data neatly into Survex so used the mailing list to get more help. Olly came back with an answer for the double compass reading and seems amenable to amending Survex to except these sort of data methods, although some of them will require thought on...

I believe that Survex handles multiple legs taken on the same trip differently from if two centrelines are combined, although if all the stations are tied together I'm not so sure. For a group of legs taken at the 'same' time with the same instrument I believe Survex just takes an average...

But why normalise, surely accuracy is best aimed for and the way the data was collected gives clues to the likely reliability. If data is collected as interleaved surely that is how it should be recorded. I assume you mean two bearings in the same direction, with different or the same compass...

A good guide. May I suggest that it is not good to preprocess your data. One of the great advantages of Survex and therefore Therion is that you can input most valid forms of survey data just as you recorded it in the cave. With an overly simplified and exaggerated case I will try to explain...

Currently the only guidelines are categories, which define small and large, traditional survey. Small is any area that is A3 or smaller. (Can be longer but thinner than A3). Large is anything else, including book type surveys. There is another category that allowes anything that is not a...

I'm guessing here, so it may be useful or it may not. I have hardly used topidroid and not this feature. So you have been warned I'm guessing that one is the geoid height and the other the ellipsoid height, which is probably height above see level and height as given by a none corrected GPS in...

There have been various reports of bugs in diving data in survey. The best place to report these is the survex email list, where they are far more likely to get actioned. Especially if there is some data that fixes it https://survex.com/maillist.html As for solutions, both the fix and the...

Josh, I've had a fiddle and to try to make it easier I have reversed the directions of the first traverse. The traverse start is probably still actually steeper than the diagram seems to show, however that is the nature of rigging diagrams, they are not in exact proportion, the obvious example...

I thought the extension we put in was resin anchors https://cscc.org.uk/wiki/equipment/start#gough_s_cave seems to suggest there are 3 coded OX. But, it could be somewhere else! I'm currently trying to improve the website, including links to the rigging, lack of time is my excuse for the slow...

It is a bit of a jump. A nice challenge. Hardest part is finding the anchors, easier now they are IC anchors not spits. Plus this means you can clip in as soon as you find them, it was always a bit of a contortion holding on while screwing in the bolts. The anchors are in good places for the...

I guess you are right that the page is left to right but if you face the wall it is right to left, however that is the nature of extended elevations, which is generally what rigging diagrams are. I followed the original positions and believe I followed the original rigging diagram, including the...

Arthur Butcher Award This is an award for  contributions to cave surveying: It can be anything that turns the eyes of the judges. However, to award it we need to know about it. Please email me (address from link below) and let me know of anything that you think deserves an award, it does not...

During Hidden Earth the Cave Surveying Group will be meeting, please see timetable for time and place. http://cavesurveying.org.uk But the interesting bit is at http://cp.cavesurveying.org.uk The CSG is an informal group of people with a general interest in surveying. All are welcome. The...