Bigger files? More pixels?

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The width and height of the images we upload to Panogio are restricted by the amount of memory available on the web server. So there is a limit to how big images we can use for now... So my question is "what is good resolution for panoramas?" And when do we start talking about gigapixel panoramas? All opinions appreciated.

While I think the resolution of images is okay, the filesize of 5MB is rather restrictive. If you take an image at 8000x4000 compressing it down to 5MB looses a lot of the image details. It would be nice to be able to upload larger images. 10MB would already make a lot of difference.

Thank you for your input. I agree about the lack of details in a heavy compressed jpg-file, many of the images on Panogio suffers from this today. I have been thinking about allowing larger files, I think the servers will be able to cope with it but how about the users? Downloading a 10 Megabyte file on every page view could be a problem for many users.

The solution, I guess, is to have to versions of each panorama. First displaying a low resolution (automatically generated) and a button named High Definition that serves the user the original high resolution panorama, much like Youtube does. I'll will put this on my to do list if not anyone has a easier solution.

I have been testing with panorama images with higher resolution during the day and came to the conclusion that with the memory I have available on the server the limit was about 9000 px x 4500 px. But by allowing images of this size lead to a new problem. There seems to be <a href=" http://krpano.com/docu/issues/">a know issue in krpano</a> (the panorama viewer used on Panogio) that sets the limit for the image to about 8000 px in either direction.

Right now you may upload images that fits within 9000 by 4500 pixels but the images shown in the viewer will be of reduced resolution. Perhaps I'll figure out a way to use larger images without making the upload more difficult... (would like to keep the simple solution with just single jpg image)