Ralf and I went to Torhola on Sunday to draw a map. We made some progress in that, but oh boy, there are so many problems, question marks, and on top of that, it is a lot of work in cold damp place!
It is also surprisingly difficult to use the modern smartphone-based software applications for caving. A big part of the problem is that I have no experience in using them, and without someone showing the proper technique by hand, the manuals are not really explaining how to do some of the things I wanted to do. For instance, it is difficult to correct information that the application determined based on measurements, such as what type of a measure a particular data point is. The flow in the applications is easiest when surveying long continues tunnels, but not at all intuitive when the cave branches in many directions all the time.