A displacement occurs in the image object of transparency in qgis 3.34

[edgm73]

I have a very high spatial resolution image generated from a UAV flight. The coordinate system is EPSG25829. To check its correctness in terms of positioning, I use an XYZ cartographic base with orthophoto from the national cartography organization.
The url is
http://tms-pnoa-ma.idee.es/1.0.0/pnoa-ma/{z}/{x}/{-y}.jpeg

When I run the plugin on the UAV image, I see how a displacement of about 60m occurs in said image.
This happens to me with version 3.34.1 but does not occur with version 3.28.
I hope they can find the key to the problem and solve it.
Thank you so much.

[nortuzar]

Same problem here, I test with version 3.28.3 and it work well. I know this plugin has not been updated for a while, but I think its an awesome plugin

[jacopo-russo]

I noticed this behaviour as well (just intstalled qgis 'Prizren' with a new class of students) I really love this plugin so I hope it will be updtdated.

[christro]

I have exactly the same problem. Tested with Prizren 3.34.4 on MacOS Sonoma and Windows 11. It would be great, if anybody could repair this. I know a lot of people who like this MapSwipe plugin

[LreeLenn]

C:\Users\Administrator\AppData\Roaming\QGIS\QGIS3\profiles\default\python\plugins\mapswipetool_plugin

Replace with .py

swipemap@lreept.zip

[marclang]

Same Problem here with ubuntu 22.04 and QGIS 3.36.3 :/

[agroecoviva]

Same problem. Fedora 40 QGIS 3.38 Flatpak and QGIS 3.34 RPM.
I noticed displaces with shapefiles, haven't tried with rasters yet.
Note that displacing gets smaller as I zoom in, and greater as I zoom out.
Tried the solution by replacing the swipemap.py and nothing changed.

SOLUTION:
Install FelixWurm fork. Works great, except for map rotating which still displaces, as announced under "Current Limitations".

[GITHUBAntoineDENIS]

Same for me with two .tif images
an offset occurs for one image when using mapswipe tool, offset is bigger when dezooming

[gabrielvgaona]

PR #21 works perfect in Ubuntu 22.04 and QGIS version | 3.38.1-Grenoble.

[Ardilajc]

In windows go to settings/system/display ad adjust scale to 100%
in Mac go to system settings /displays and adjust screen resolution
Hope this works, it did for me, it is a great toolto compare before and after

[nikosGeography]

In windows go to settings/system/display ad adjust scale to 100% in Mac go to system settings /displays and adjust screen resolution Hope this works, it did for me, it is a great toolto compare before and after

this solution works but I don't think it's efficient because someone needs to change the resolution of his display just to use the plugin. It would be nice if the maintainers of the package correct the issue.

[KiwiMapGuy]

Thanks nikosGeography. I have encountered the displacement issue in the last few months. Adjusting the scale to 100% "fixes" the problem, but my poor old eyes can't read the screen.
This is/was a brilliant Plugin and extremely useful. I hope the software authors fix the problem soon.

[mercerraa]

@Ardilajc work around did the trick for me on 3.40.2 Couldn't work out why the plugin worked just fine at the office (big screen) but didn't at home.

[KiwiMapGuy]

On my computer screen when I have set the display scale to 100% (default 125%) I find everything on the screen is too small, but the Swipe Tool works properly. The map can be enlarged or shrunk by either scrolling with the mouse wheel, or using Ctrl + (zoom in) and Ctrl - (zoom out). However, whilst the map size can be changed the Sidebar and Toolbar stay at the original size (too small for me).

[tfriedel]

As mentioned above, there is a fix in pr #21
Seems like this project is not getting updated anytime soon, so you have to install this fix manually.
Go to https://github.com/FelixWurm/mapswipetool_plugin/tree/master
Download the repository as zip, then install the plugin in QGIS as a zip file (and uninstall the existing MapSwipe tool).