Blog/Really Big Images
Really Big Images
July 6, 2025
A while back, I wrote a blog about using Sentinel-2 data to create map tiles. Using the Sentinel-2 Global Mosaic service, I could export huge regions into .tif files. I can then use those .tif files and make .mbtiles for use in map applications.
I can also convert them into JPEGs.
I'm limited by file size here so this one is only a measly 28,452 by 16,004 pixels, at a respectable 82MB.

The larger one of Vancouver is 65,500 by 31,421, weighting in at nearly 900MB. This is just about the maximum width a JPEG can be, which is limited to 65,535. If you wanted an even larger image for some reason (this large JPEG has no applications other than being cool to look at), PNG is a good option with support for about 2.1 billion pixels in each dimension.