I have spent some time reading the archives, but I don’t seem to have found an answer to my question.
I am developing a journal where some publications will features zoomable images using OpenSeaDragon (http://openseadragon.github.io/). This normally involves the creation of image tiles, i.e. sliced images arranged in resursive directories. As far as I can see, there does not seem to be a way to upload such recursive directories to HTML galleys, and I am thinking about the best way to solve the problem. Of course, it is possible to put the images in a directory created specifically for this purpose, but I wonder whether there are more elegant solutions.