[Therion] World Magnetic Model

The last Therion release 5.4.3 is dated 01 Feb 2019. There has in recent years been a significant change of the Magnetic North Pole location, less so for the Geomagnetic South Pole: https://ngdc.noaa.gov/geomag/GeomagneticPoles.shtml Given the above, an out of cycle World Geomagnetic Model WMM201

Re: [Therion] Lox model volume calculation

Suggest you try CloudCompare and/or Meshlab. There was a post on this subject: https://therion.speleo.narkive.com/tyAS1f1D/export-to-3d-processing-softwares MeshLab is prone to crashing and can be very frustrating but I have got cave volume results from it. Kevin On Sat, Dec 15, 2018 at 6:01 PM

Re: [Therion] Fix station point using only 2D

Adam, Radio-location can give you depth but accuracy is not too good. How have your surface positions at the entrance(s) and the radio location been determined ? Professional GNSS (~3cm), DGPS(~1m) or hand held (~3m) ? I have radio-location fixes at the far end of a system to control any accumula

[Therion] Surface Contours

I have randomly distributed surface points from a Post Processed Kinematic GPS survey (accuracy ~10cm) and wish to calculate surface contours. The reason for doing this is to have detailed data for all the shakeholes. Would like to import the contours into Survex/Therion so these can be seen above

Re: [Therion] 3D output file for printing

3D Output Suggest you use the open source Meshlab program for editing, converting between 3D formats and point clouds. I have done 3D crystal engraving using a sub-sampled point cloud. This is particularly effective when lit by variable LED's but you will be limited by the available crystal sizes.