I did similar thing in one map transferred to Therion from Illustrator. See attached image. 

The principle is I made an underlaying dummy scrap filled with area with pink colour bounded by wall type invisible. The profile is filled by colour by color map-fg command. So in final map the pink area is overlaid by map of cave.

But it was made by hand drawing not generated as special kind of line wall.

Martin

 

26. 5. 2019 v 12:53, ⁨עמרי גסטר⁩ <⁨omrigas@gmail.com⁩>:

thanks for the answers

I don't know what Metapost or CSS box-shadow are (yet...)

I'll do a bit of reading about it and try to make it work

On Sun, May 26, 2019 at 11:09 AM Martin Sluka via Therion <therion@speleo.sk> wrote:


26. 5. 2019 v 9:56, Tarquin Wilton-Jones via Therion <therion@speleo.sk>:

It may be possible to do this with CSS and SVG too. Export your cave
survey as SVG, and use CSS box-shadow to add an outline.

You may do it directly in Metapost.

Martin
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