[Therion] Sketches on doesn't work / legacy survey

[Roger Schuster]

Hello cavers,

currently I try to work with some legacy survey which are the original 
survey data and the final map with scale bar but without marked 
stations. My intention is to geo-reference the existing map (i.e. 
attaching the entrance location to the UTM grid) and use it in a cave 
atlas of the area. I don't want to redraw the whole map in Therion.

I followed the directions given in the therion wiki and entered the 
survey data and the resulting model in Loch looks fine and plausible. 
After that I created a scrap with the scanned map (projection plan) and 
scaled it using the scale bar and the scaling tool of Xtherion map 
editor. I marked the location of the first survey station at the cave 
entrance and in the layout section of my thconfig I turned on sketch 
export. Unfortunately it doesn't work. The generated pdf only contains 
the map header (with wrong length and depth statistics btw!) and a short 
part of the first survey shot. I expect the whole scanned background 
image to be visible and in scale in the pdf. Honestly said I never got 
the "sketches on" working with any of my old and new maps. What I am 
doing wrong? Any pointer to the right direction is highly appreciated.

Best regards and thanks in advance,

Roger
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