*The meaning I meant to convey was; I don’t think I have seen a description of exactly the settings and workflow TopoDROID users should use if they want to export their data for Therion to process, in one place, and step by step. No doubt the detail is in the TopoDROID user manual, but it is scattered around, and interspersed with information that is not particularly useful for Therion users.* bruce, you are right. i misunderstood. a therion wiki page, a sort of "howto use topodroid for therion", is probably a good idea *And little indication of what settings will make life pleasant or unpleasant for Therion users. Many of the default settings seem to be Therion unfriendly, as evidenced by the examples posted on the Therion forum over the previous year or so, and my own subsequent experimentations.* this is probably because the default values of topodroid settings try to fit the average cave surveyor/cartographer, and only a minority of them uses therion. anyways, i think that the therion-relevant settings are only a few *I suspect what is missing is a user guide that describes what to do to ensure a pleasant Therion experience with data generated by TopoDROID. Your post from 3-4 December is the first time I recall seeing such a targeted user guide format, and I am wondering if a Therion wiki page based on your post might fill that gap. * however, i do not expect my way to be the best and the only one. i do not think there is a definitive way to work from topodroid to therion. the process depends also on the environment (=cave) and resources (=android device/distox). the wiki page might provide general rules and point to program features that are important for the drafting of maps with therion and cave project managing. * I am happy to create the outline of a wiki page and fit it into the Therion wiki structure somehow. If I start something, maybe someone else can fill in the gaps* as i said, i think it's a good idea. do it. and i hope other users add in their advices marco