[Qgis-user] Grid shift FIle for MSI version

[Dario]

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?



_

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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