[Therion] map survey option now causes (fatal) error

[Thomas Holder]

Hi Bruce,

My bad, I should have given better instructions.
Windows installer can be found at
https://github.com/speleo3/therion/actions/runs/24804175147

Enjoy your trip!

Thomas

On Thu, Apr 23, 2026 at 9:42 PM <bruce at tomo.co.nz> wrote:
>
> Thanks Thomas
>
> Unfortunately I don’t know how to install or run from a commit or pull request that does not seem to have an installer.
>
> I found my way here, but nothing there looks like a Therion install I can run.
>
> Fix crash with circular map reference · therion/therion at 54c4a9a
>
>
>
> If you have any tips that would be great – I’ll be unavailable for about four days, so no immediate rush.
>
>
>
> Thanks
>
> Bruce
>
>
>
>
>
>
>
> -----Original Message-----
> From: Therion <therion-bounces at speleo.sk> On Behalf Of Thomas Holder
> Sent: Thursday, 23 April 2026 10:21
> To: List for Therion users <therion at speleo.sk>
> Subject: Re: [Therion] map survey option now causes (fatal) error
>
>
>
> Hi Bruce,
>
>
>
> Can you try the branch from this pull request?
>
>
>
> https://github.com/therion/therion/pull/746
>
>
>
> Best,
>
> Thomas
>
>
>
>
>
>
>
> > On Apr 18, 2026, at 22:59, bruce at tomo.co.nz wrote:
>
> >
>
> > For a few maps in a few surveys I have been using the -survey option to constrain map statistics to match the underlying survey (page 34-35 of Therion Book).
>
> > I think some recent version of Therion has broken this.
>
> >  The start of my map definition…
>
> >    map MiddleEarthElev290Map \
>
> >   -title "Middle Earth and<br>Lower Greenlink Caves<br>Elevation looking 290 deg" \
>
> >   -projection [elevation 290 deg] \
>
> >   -survey MiddleEarth # survey option forces map statistics to match
>
> > the survey  The error reported… via Mapiah… C:\Program
>
> > Files\Therion\therion.exe: error -- Press ENTER to
>
> > exit!./GreenlinkArea/./middleearthcave/INDEXMiddleEarthElev290.th
>
> > [579] -- invalid survey reference – MiddleEarth  via XTherion
>
> > C:\Program Files\Therion\therion.exe: error --
>
> > ./GreenlinkArea/./middleearthcave/INDEXMiddleEarthElev290.th[579] -- invalid survey reference -- MiddleEarth writing xtherion file ... done  I am using… therion 6.3.4+d9c313ac (2026-03-29)
>
> >   - using Proj 9.8.0, compiled against 9.8.0  Anyone else noticed
>
> > this?
>
> >  Thanks
>
> > Bruce
>
> > _______________________________________________
>
> > Therion mailing list
>
> > Therion at speleo.sk
>
> > https://mailman.speleo.sk/listinfo/therion
>
>
>
>
>
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