[Therion] Therion 5.4.2. potential bug

[Martin Budaj]

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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