Hi all I'm using passage-height:negative points as points of waterdepth in a map of a cave. How can I use the most negative number in code tex-map ... endcode section? Is it possible at all? I would like to print the maximum waterdepth into the legend of a map. But I don't want to use any kind of an override. I would like to have some automatism instead. The part "\the\cavedepth" is not working as there are parts in the cave that are some meters above the waterline. Therefore I get "wrong" numbers for the waterdepth (e.g. if the cave is going from -5m up to +5m I do get 10m as cavedepth). If there are other possiblities to get waterdepth in some kind of automatic (without using an override like \cavedepth{5} ) please let me know. Thanks for your help, Torsten