I remember faintly that some years ago, when I used Therion for a bit (but
did not progress further as centreline output) there was a discussion about mining symbols for Therion. I lost these Mails; archive says 2007. I think this would broaden the applicability of Therion to mine explorers. I remember. http://search.gmane.org/?query=mine+mining&author=&group=gmane.comp.gis.ther ion&sort=relevance&DEFAULTOP=or&xP=Zmine&xFILTERS=Gcomp.gis.therion---A
Has, by any chance, work progressed in this field, as I could not find anything via web/wiki search? If not, how can I help?
Not as far as I know.
Until then, is there a possibility I can insert a free hand draw of, say, a shaft symbol (which would be more of an area)?
No, images can be inserted, but they are located relative to the page, not to the survey. And background pencil sketches can be displayed, so you could redraw bits of your map in pencil (or another software package)and insert the bitmap as a background sketch. Both terrible hacks, lets just say the answer is no. You can take existing symbols and rename and change them to your liking. Refer to http://therion.speleo.sk/wiki/lib/exe/fetch.php/therion_symbols_20130407_.pd f for a list of built-in symbols Refer to http://therion.speleo.sk/wiki/doku.php/metapost for some other symbols and guidance on how to make or adjust for your own use. Perhaps there are other mine explorers who have done this already? Bruce