Martin I think nosurvey will be the best compromise (when I can get the nosurveys to stop crashing the extended elevations). I can set it to approximate and duplicate, so that is shows up yellow and dashed with my metapost customisation. However
nosurvey is nosurvey.
True, in the labyrinths of Therion maybe. However I don't think 'nosurvey' legs are distinguished from other survey leg types in the outputs, so not necessarily 'nosurvey' in the mind of those viewing the outputs. Unless I am missing something. How is the recipient of these outputs to know that there is a 'nosurvey leg? In the outputs below, there are perhaps subtle clues because I have included splays and passage walls, but nothing that would stand out to an inexperienced recipient. Bruce
