Hi, I have survey data with LRUD's for the from-station as follows: ----- centerline data normal from to length compass clino left right up down a b 10 90 0 2 0 2 0 b c 10 90 0 0 2 2 0 c d 10 90 0 2 0 2 0 endcenterline ----- Since LRUD is measured at from-station this data indicates that station a and c is positiond at the right cave wall and station b is positioned at the left wall (station d is undefined). In the generated map however the cave walls is drawn so that station b is positioned at the right wall and station c is positioned at the left wall (see attached pdf). It seems that the LRUD's are applied to the to-station instead of from-station (except for station a). Is it possible to change this behavior? I'm using the following thconfig file to export a map with walls generated by the LRUD values: ----- source data.th layout my_layout colour map-fg [100 0 0] colour map-bg [100 100 100] debug all endlayout export map -projection plan -o map.pdf -layout my_layout ----- /niklas