I have a .tiff file of an image, it is 17815 x 12426 px and is landscape. I need to print it 3 x 4 metres portrait, it's for a wall vinyl or canvas. The resolution is 500dpi. So if I try to resize it at 300x400 cm it isn't high enough to do so without stretching it bigger.
Would it be best to do it at half size eg. 150 x 200 cm then tell the printer to output at 200% or what would be the best solution? also should the resolution stay at 500dpi? Thanks!