Define several maps, export them separately and use -map-image to place them in one export. As continuatuon line you may modify user line strata https://therion.speleo.sk/wiki/metapost#line_symbols <https://therion.speleo.sk/wiki/metapost#line_symbols> Martin
20. 12. 2019 v 10:00, Tarquin Wilton-Jones via Therion <therion@speleo.sk>:
Hi all,
With extended elevations, you might want to show only the most important parts, like pitches, while showing long passages as a shorter distance with a break symbol. Imagine a cave with an initial pitch, a long passage, and a final pitch, where the extended elevation should concentrate on the detail of the pitches only, and not have the long passage wasting space. For a real example, see this rigging topo:
https://cncc.org.uk/caving/topos/download-single.php?id=6
If the passage is horizontal, you could easily achieve this by setting the legs of the long passage to "extend vertical", so that its stations to not take up any horizontal length. You can then manually draw the gap with some lines.
However, if the long passage slopes downwards, this will make the two parts of the passage break with a vertical gap between them. This makes sense because it means that the extended elevation will show the vertical range of the cave, which is great if that's what you are hoping for. But in a rigging topo, it is less useful. There is no equivalent that I can see to "extend equate 21 57", which would be an equate that happens only during an extended elevation. Essentially, this is the desired outcome though.
For a real example, see this rigging topo - the breaks represent a passage that has lost as much as 20 metres of altitude, which is completely ignored:
https://cncc.org.uk/caving/topos/download-single.php?id=61
One method I can think of - but it feels like a hack - is to draw the upper pitch in one map, and the lower pitch in another map, then use map offsets to pull the lower map into the desired position when rendering.
Does anyone have a better solution to this? Can "extend hide" do something useful or will that still keep any vertical (and horizontal) offsets?
Thanks for any advice.
Tarquin _______________________________________________ Therion mailing list Therion@speleo.sk https://mailman.speleo.sk/listinfo/therion
