2016.11.14 21:16 "Re: [Tiff] Right way to make a multi-resolution pyramid", by Paavo Helde

On 14.11.2016 20:16, Kemp Watson wrote:

> Hi all:

What is the “correct” or canonical way to make a (tiled) multi-resolution pyramid in TIFF?

Most implementations simply chain top-level IFDs together, I’ve seen

starting with the base or full-res layer, and going smaller from there to

the apex. this seems wrong to me.

You are right, sub-IFDs would be more appropriate. However, sub-IFDs are not so well supported by various TIFF readers. That was the reason why in my company when they were working out the pyramidal TIFF schema a couple of years ago they still went with top-level IFD-s.

Cheers
Paavo