[Qgis-user] Transfer projects

[Nicolas Cadieux]

See below.

On 2020-10-19 2:03 p.m., Bryan Knibbs wrote:
> Hi Nicolas
> Thanks for your email i can access the projects without any problem 
> but they don't save on the recent projects page.
> The comment as follows appears at the top of the page
If you resave the project in 3.14, it should appear.  If not, make a bug 
report.
>
> The preferred transform between EPSG:27700 - OSGB 1936 / British 
> National Grid and EPSG:4326 - WGS 84 is not available for use on the 
> system.
>
>   * This transformation requires the grid file
>     “OSTN15_NTv2_OSGBtoETRS.gsb”, which is not available for use on
>     the system.
>
> Current transform “Inverse of British National Grid + OSGB 1936 to WGS 
> 84 (6)” has an accuracy of 2 meters, while the preferred 
> transformation “Inverse of British National Grid + OSGB 1936 to WGS 84 
> (9)” has accuracy 1 meters.
>
> Bryan
>
One of the big resent changes in QGIS is the move to  better 
transformation parameter and to make better use of transformation grids. 
(This also gives you more messages like the one above.). This message 
basically tells you the grid file you were using is not available. It is 
likely that you had a file in OSGB 1936 but the project is in WGS84, 
thus the need for reprojection.   You either find the grid and install 
it in QGIS or make sure the grids for Europe are available in your 
QGIS.  If you use the OSGeo4W setup, look under proj-datumgrid-europe.  
For more help on this I would ask an new question on the list as you 
will have more people respond with this specific question.

Nicolas


> Bryan Knibbs
> +44(0)7551 726150
> bryan.knibbs42 at gmail.com <mailto:bryan.knibbs42 at gmail.com>
>
>
> On Mon, Oct 19, 2020 at 4:02 PM Nicolas Cadieux 
> <njacadieux.gitlab at gmail.com <mailto:njacadieux.gitlab at gmail.com>> wrote:
>
>     Hi,
>
>     Projects should open without difficulty. When saved, they will be
>     updated. Are you having problems opening a project?
>
>     Nicolas Cadieux
>
>>     Le 19 oct. 2020 à 08:26, Bryan Knibbs <bryan.knibbs42 at gmail.com
>>     <mailto:bryan.knibbs42 at gmail.com>> a écrit :
>>
>>     
>>     I have just upgraded to version 3.14.16 from 3.4 and want to
>>     transfer my projects
>>     Please advise the procedure.
>>     Bryan
>>
>>     Bryan Knibbs
>>     +44(0)7551 726150
>>     bryan.knibbs42 at gmail.com <mailto:bryan.knibbs42 at gmail.com>
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