(03-24-2017, 09:08 AM)tanda Wrote: I think it is 1536x2048. ...snip...
Do you think that in linux it would be different? If so, I will try as soon as I am back in my office on Monday.
Different in linux than OSX, doubt it.
I certainly think the image proportions are off for A3. Without more details of your image difficult to determine where that pixel size for A3 came from. You can find canvas size the top of the Gimp window.
The metric size for A3 is 297 mm x 420 mm
Creating a new canvas in Gimp closest to your image of 1536 x 2048 pix comes up with 1450 x 2050 pix @ 124 ppi. There are of course rounding errors involved but even so, the width of your image is well out for A3.
Trying to get some meaningful screenshots and failing
This one making a A3 canvas and the export to .ps parameters I used.
This does convert to a correct PDF in linux. This using ps2pdf and opened in Evince to view and show the pdf properties.
Edit:
First, ask the originator if a bleed margin (3 mm on all sides) and any provision for a printing company crop are used.
Regardless of that, another look using Gimp.
This is what gives me an A3 PDF using your canvas 1536 x 2048 pix
Open the image in Gimp and in Image -> Print Size (1) Change the height to 420 mm the other values should change to values as shown (2).
Now go and export as something.ps, mm units, zero offsets. Untick keep aspect ratio(3), set the width and height to A3 size 297 x 420 mm (4)
Run the resulting file through ps2pdf
Code:
ps2pdf -sPAPERSIZE=a3 in-file.ps out-file.pdfIf you want to check the PDF in Gimp open the PDF (not sure if the OSX Gimp supports opening a PDF). The default ppi is always 100 so use say 124 ppi and you should get close to the original pixel size, A3-size proportions and no white borders.