[Therion] Surface Contours

[Philippe Vernant]

Hi Kevin,

You could definitely use QGIS to do that, and probably export in a format close the the one used by Therion. I’m using directly GDAL command lines to convert in a format similar to the surface file for Therion, I can dig in my files to find the command line. But I don’t know if you can use directly the GDAL command lines with windows OS.

Phil



 
> On 14 Aug 2018, at 16:32 PM, kevin dixon via Therion <therion at speleo.sk> wrote:
> 
> 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 the cave.
> 
> Has anyone else done this and how ?
> 
> My current thinking is to use the QGIS Contour tool to generate the contours and then import these into Survex/Therion as elevation strings using some intermediate data format yet to be decided.
> 
> Thanks,
> 
> Kevin  
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