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I have no experience with this in particular but thinking on it I would think the way to make the size more user friendly would be to make 300 dpi display jpegs, possibly greyscale if without images, and stitch those together into a pdf. I imagine that would be decent sized off. Now if you wanted ocr that won't help but it should make the pdf much smaller. Matt Sherman On Feb 22, 2013 7:47 PM, "Wilhelmina Randtke" <[log in to unmask]> wrote: > > I had this problem last year. > > I did PDF. There are about no studies on PDF size and usability. What I > did is go to gray scale for text pages to knock down file size, played with > optimizing, and broke super long (think 3K page book) files in smaller > chunks. > > It does not make for a pleasant browsing experience, but files load in a > timely manner even on a poor connection, and files are not large enough to > be cumbersome. I also had absolutely no IT infrastructure where I was at, > so prepared and prepped PDFs in static file storage were my only option. > If you have a CMS that will deliver pages, like maybe current page and > preload next 5, or something like that, then you have many more options for > a good user experience. > > When I looked at other big long books online, I found they tended to use > 300 dpi gray scale or 600 dpi black and white. I just looked at government > documents, because that's what I worked with. > > -Wilhelmina Randtke > > On Fri, Feb 22, 2013 at 6:50 PM, Kyle Banerjee <[log in to unmask] >wrote: > > > We have a few digitized books, (some of them are old -- we're talking 500 > > years). Sizes are all over the place but the big ones are easily the size > > of a large briefcase. > > > > We want to make these works more accessible/usable and there's some demand > > to make them available for tablets. What experience do people have with > > stuff like that, and what software/services/methods do you recommend? > > > > Source files are 600 dpi uncompressed tiffs so they're pretty big and > > there's nothing special about a book being over 10GB in size. Thanks, > > > > kyle > >