Hmmm... OK, one more WILD idea:

Print the colored map as an atlas. There are a lot of parameters that go into generating an atlas. I suspect with some playing around you could get somewhat close to getting the portion of the cave you want on one page of the atlas.

From there it is a simple matter to extract one page from a PDF file and make it into a new file.

I was not anticipating that anyone but you would need ImageMagick. I thought the use case was that you would generate and distribute the image files, and everyone else would simply admire your handiwork! :-)

--

Bill Gee

On Monday, December 2, 2019 3:08:41 PM CST Tarquin Wilton-Jones via Therion wrote:

> > It is quite easy to turn a PDF into a JPG, especially on Linux. Once

> > that is done, then any decent photo editor can crop it. The legend will

> > be a problem. I suppose you could crop out two sections (the legend and

> > the cave portion you want) and paste them into a single image.

>

> Thanks for the suggestion.

>

> For me, this is all very easy indeed, and if it were only me that

> mattered, I would probably go down this route (as I have done with

> wkhtmltopdf to get a modified cavelist into a survey). Even removing the

> legend part is very easy with the various Therion options. But my

> intention is to be able to share my surveys, source and all (they are

> going to be one of the open source licences). Sadly, I cannot expect

> another user to have to install and configure ImageMagick, and make

> adjustments when adding new cave passage to a survey which shifts the

> positions of things.

>

> This is why I am hoping for a solution that works entirely within

> Therion, if at all possible.

>

> Still hoping for "altitude-relative caveMP@cave", which would be so much

> easier for both my use case, and the use cases that I can see others

> wanting :)

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