[Therion] Therion 5.4.2. potential bug

[Martin Sluka]

There us actual developers version of windows instalation available. 

Martin Sluka

Odesláno z iPhonu

18. 1. 2019 v 9:32, Michael via Therion <therion at speleo.sk>:

> Thank you, Martin, for the quick fix.
> Is it also fixed in
> https://therion.speleo.sk/downloads/therion-setup-5.4.2.exe
> ?
> Regards,
> Michael.
>  
> Von: Therion <therion-bounces at speleo.sk> Im Auftrag von Martin Budaj via Therion
> Gesendet: Donnerstag, 17. Januar 2019 19:26
> An: List for Therion users <therion at speleo.sk>
> Cc: Martin Budaj <m.budaj at gmail.com>
> Betreff: Re: [Therion] Therion 5.4.2. potential bug
>  
> Hi, it's fixed in d98a0a6.
> Martin
>  
> On Tue, Jan 15, 2019 at 7:28 PM Martin Budaj <m.budaj at gmail.com> wrote:
> On Sat, Jan 12, 2019 at 10:51 AM Michael <knollesimage at t-online.de> wrote:
> I have now attached a minimal cave sample produced  with 5.4.1. and one produced with 5.4.2. to demonstrate the displacement.
>  
> Hi,
>  
> the problem is that EPSG:31467 projection uses the "potsdam" datum and the PROJ library used by Therion changed the way how to transform potsdam datum to the standard WGS84 datum – it switched from a simple string parameter (towgs84) to using external grid file (see https://proj4.org/resource_files.html#transformation-grids for examples). 
>  
> No grid files are currently included in the windows Therion distribution, so the transformation is not correct in 5.4.2. Therion needs to be modified to include and use those files – hopefully soon.
>  
> Best regards
> Martin
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