Transformation of .shp files with Proj library

[A-Nesse1]

What is the bug or the crash?

Transformation of shape files between EPSG 27391 to EPSG 25832 is not correct. If I use Json or DWG format it works fine. I am using the Proj library for transformation.

Steps to reproduce the issue

EPSG-27391.zip correct 27391 and 25832-GeoJson.zip

Versions

3.34.3

Supported QGIS version

• [X] I'm running a supported QGIS version according to the roadmap.

New profile

• [X] I tried with a new QGIS profile

Additional context

No response

[m-kuhn]

Can you add the precise steps to reproduce?

[A-Nesse1]

Yes I can. I have attached a shape file and a GeoJson file in EPSG27391, then you can try to transform it in Q-GIS to EPSG 26832 or to EPSG 32632. You will then see the differences.

Anders

Anders Nesse Phone: +47 45 40 15 79 | @.***

Norconsult Digital AS Kjørboveien 22, NO-1337 Sandvika Tel: +47 67 57 10 00 | www.norconsult.no

Every day we improve everyday life

From: Matthias Kuhn @.> Sent: Sunday, February 25, 2024 9:53 PM To: qgis/QGIS @.> Cc: Anders Nesse @.>; Author @.> Subject: Re: [qgis/QGIS] Transformation of .shp files with Proj library (Issue #56343)

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Can you add the precise steps to reproduce?

- Reply to this email directly, view it on GitHubhttps://github.com/qgis/QGIS/issues/56343#issuecomment-1963057863, or unsubscribehttps://github.com/notifications/unsubscribe-auth/BGEYMQ3SGV7CNMRQAZZFH5TYVOQCHAVCNFSM6AAAAABDH44FBOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNRTGA2TOOBWGM. You are receiving this because you authored the thread.Message ID: @.***>

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[m-kuhn]

Can you add a screencast (or a few screenshots) that show how you transform? You particularly mention the proj library, so I wonder how you explicitly invoke or avoid that.

[A-Nesse1]

Attached is my workflow in word format and EPSG27391 files in Shape and GeoJson.

If you try them, you will hopefully see that the transformation are different for .shp and .json

Anders

Anders Nesse Phone: +47 45 40 15 79 | @.***

Norconsult Digital AS Kjørboveien 22, NO-1337 Sandvika Tel: +47 67 57 10 00 | www.norconsult.no

Every day we improve everyday life

From: Matthias Kuhn @.> Sent: Monday, February 26, 2024 5:41 PM To: qgis/QGIS @.> Cc: Anders Nesse @.>; Author @.> Subject: Re: [qgis/QGIS] Transformation of .shp files with Proj library (Issue #56343)

Det er ikkje ofte du får e-post frå @.**@.>. Les meir om kvifor dette er viktig.https://aka.ms/LearnAboutSenderIdentification

Can you add a screencast (or a few screenshots) that show how you transform? You particularly mention the proj library, so I wonder how you explicitly invoke or avoid that.

- Reply to this email directly, view it on GitHubhttps://github.com/qgis/QGIS/issues/56343#issuecomment-1964605438, or unsubscribehttps://github.com/notifications/unsubscribe-auth/BGEYMQ3QG2763TXY4YCDIDTYVS3JVAVCNFSM6AAAAABDH44FBOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTSNRUGYYDKNBTHA. You are receiving this because you authored the thread.Message ID: @.**@.>>

CONFIDENTIALITY AND DISCLAIMER NOTICE: This message is for the sole use of the intended recipients and may contain confidential information. If you are not an intended recipient, you are requested to notify the sender by reply e-mail and destroy all copies of the original message. Any unauthorized review, use, disclosure or distribution is prohibited. While the sender has taken reasonable precautions to minimize the risk of viruses, we cannot warrant the absence of, or accept liability for, any such viruses in this message or any attachment.

[m-kuhn]

@A-Nesse1 It looks like your attachment didn't make it through, ideally you upload it directly on the github issue web interface.

[A-Nesse1]

Transformation in Q-GIS.docx 27391.zip Files for testing and documentation on how it is done