[Therion] Overlaying xvi file and map background as the same scale

[Martin KERN]

Hi Martin,

Thanks for your answer.

I want overlay .xvi file and image file for two reasons.

1)     I can see if the old survey what I have is correctly drawn, so if
stations of .xvi and image are on the same position.

2)     This cave is still in exploration. When I will add new stations, how
I’ll draw them if the xvi and the first part of the cave are not on the
same scale ?
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