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Only parts of image is requested based on where you zoom . Image is divided into number of slices and fetched on demand .

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My guess is it works well for very large images . For smaller images of real world , I am not sure how effective it is ( apart from usual optimizations ) .

I think this is something that should be present everywhere. Especially when serving customers from countries with unreasonable data caps enforced by ISPs.

I have seen some times load up 5-6 MB files when a 100-200kb image would have done the job.

If us developers could have an easy way to do this, I think it would really make the internet a lot faster.

Of course, but the average smartphones are now doing 20Mpx, and semi-pro cameras around 50Mpx...

You can probably do this by hooking Leaflet.js up to a custom tileserver ;P

A bit more work then ;)

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