I'm wondering how to make it so that each individual map will have a uniquely colored centerline? This would be very helpful for differentiating between different surveys at a glance. In the following example, I would like to to have clay_splay and clay_center be drawn in different colors. The map that I am selecting in thconfig is clay_main, by the way. <code> map clay_splay -proj plan splay.trip2 splay.trip3 endmap map clay_center -proj plan center.trip2 center.trip3 endmap map clay_main clay_splay clay_center endmap clay_main </code> I've attached a PDF that shows roughly what I have in mind, although the alternating blue and green is not necessary. They can both be the same color, as long as that color isn't the same as the centerline :-). Does there happen to be a metapost wizard out there who might have an idea? Thanks in advance! -- -Jonny ^v^