[Therion] DistoX and PocketTopo with Therion

[Martin Budaj]

> The Export Therion format does not seem to produce data in a format similar
> to what Therion normally accepts – after the data it produces some form of
> co-ords separated into plan and elevation partitions.  Most of the survey
> stations are converted to 10 digit numbers and all of the keywords are in
> capitals.  Much of the file content could be made Therion compatible
> relatively easily using a text editor, but surely this is not what is
> intended?

This is a special intermediate format which can be easily imported
into xtherion:

 * added import functions for PocketTopo export
   - centerline in text editor - File->Import->PocketTopo therion export
   - sketches in map editor - Backgroud Images->Insert->PocketTopo
therion export

There are some issues, but most of the features are supported.

Martin