Print an image (2480x7016) on several A4 pages

[Fleshus]

As I saw on the internet, an A4 sheet would be equivalent to a 2480 x 3508 pixel photo in 300dpi. As I need two A4 pages for my project, I created a 2480x7016 image but GIMP (or other software) does not offer me to print on two pages.
So I cut this image in two with a selection rectangle and printed separately. However, the printed result does not match the preview of the image in question (I compared).
Can someone help me? It's incredible that in 2025 we struggle for something so simple...

[Ofnuts]

The problem is what your printer prints. And I'm even surprised that you didn't get any margins...

Did you print directly from Gimp or did you export the image to print it with  a dedicated application (like Windows image viewer)?

Otherwise, what works is the overlap-and-cut technique used for (physical) wallpaper, that I recently described here (and I'm sure you'll find plenty of YT videos).

[rich2005]

@Fleshus

The Gimp File -> New menu does have pre-set A* sizes set to 300 ppi for printing.  You can use the A3 template 3508 x 4960 pix in either portrait or landscape mode, or if you want to keep the top and bottom in portrait mode, rotate the image 90 deg. (the printer can also do this but you might be happier doing it yourself)

I might have something like this, a rotated image with a 50% Vertical Guide Image -> Guides -> New Guide by Percent.

   

That splits the A3 image into 2 x A4 images using Image -> Slice Using Guides.

If your printer supports borderless printing you can set the print dialogue like (1) but do not do it. 

Even commercial printers require an outside "Bleed Margin" (typically 5 mm)  and an inside "Safe Area" to allow for paper alignment and paper cutting.

Use the printer to set the margins, as (2) Change the printing resolution > 300 first then you can adjust margins. Make a note of the settings for the second print. That should give sufficient "wriggle room" for paper not going through straight, paper feed needing bottom margin.....

   

[Fleshus]

In fact I had printed with Paint.NET (I also tried with Window image viewer and it gives the same), but I tried from Gimp and the result is worse, even though the preview looked good, once printed there are borders.

   
   

In any case with my printer (Canon PIXMA MG6150) yes I can print A4 pages completely without borders (with Paint.NET in any case) but slightly "zoomed" instead of "truncated" apparently...
I will try to ask on Paint.NET forums or even directly at Canon. Or to make a slightly smaller image... But I don't think that is the origin of the problem, I carefully compared the image before/after printing and it is really at the time of printing that there is a "resizing" problem.

The images put side by side in Gimp:
   
The result once printed:
   
   

(My photos from the first post were in the wrong direction but it doesn't matter because even in the right direction it doesn't match).

Thanks for your help in any case!