You can push that to 3569x4699 - https://iiif.micr.io/qDCTO/full/3569,/0/default.jpg https://iiif.micr.io/qDCTO/full/3569,/0/default.jpg Then it will complain

You can push that to 3569x4699 - https://iiif.micr.io/qDCTO/full/3569,/0/default.jpg https://iiif.micr.io/qDCTO/full/3569,/0/default.jpg Then it will complain that 3570x4700 is too large because "the maximum is 4000x4000px" which is weird because 3569x4699 is already bigger than 4000x4000 in both linear and areal dimension. But what they really mean is 16Mi pixels - 16770731 (3569x4699) < 16777216 (2*24, 4096x4096) < 16779000 (3570x4700).