[Qgis-user] Grid shift FIle for MSI version

[Even Rouault]

Le 31/08/2021 à 19:56, Dario a écrit :
> First of all all, thank you for your reply.
>
> Regarding the grid issue, you know why whit the exe release I don’t 
> have this kind of problem?
I'm not familiar with the Windows packaging side. Perhaps an older PROJ 
version where the existence of the grid wouldn't even be present in the 
database. But do you actually get different results when using both 
versions ?
>
>
>
> _
>
> Il giorno 31 ago 2021, alle ore 19:48, Even Rouault 
> <even.rouault at spatialys.com> ha scritto:
>
> 
>
> If I recall well, this grid is produced by Istituto Geografico 
> Militare (IGM), www.igmi.org but they don't propose it for free. 
> You'll have to pay to get it.
>
> Even
>
> Le 31/08/2021 à 19:40, Dario C a écrit :
>> Hi,
>>
>> I'm working on a 3003 project with 7791 layers. Once I updated to 
>> 3.16.10 msi release I received this message:
>> /"The preferred transfer between EPSG: 7791 - RDN2008 / UTM zone 32N 
>> and EPSG: 3003 - Monte Mario / Italy zone 1 is not available for use 
>> in the system./
>> /This transformation requires the lattice file 
>> "35160622_47161840_R40_F00.gsb", which is not available for use on 
>> the system.
>> The current transformation "Inverse of UTM zone 32N + Ballpark 
>> Geographic offset from RDN2008 to Monte Mario + Italy zone 1" has an 
>> unknown accuracy, while the current transformation "Inverse of UTM 
>> zone 32N + Inverse of Monte Mario to RDN2008 (5) + Italy zone 1 "has 
>> an accuracy of 0.1 meters."/
>> /
>> /
>> and actually I have translated projection between 7791 and 3003 
>> (around 100 meter)
>>
>> I tried to install 3.16.10 exe (instead of msi) and everything works 
>> well.
>>
>> Is it a bug or I just need a .gsb file? In this case, where can I 
>> find .gsb file? Thank you
>>
>> cheers
>>
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> -- 
> http://www.spatialys.com
> My software is free, but my time generally not.

-- 
http://www.spatialys.com
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