This is great, I was literally banging my head against a wall last night trying to determine how the length of the ECS was determined. What a lucky coincidence!

This is great, I was literally banging my head against a wall last night trying to determine how the length of the ECS was determined. What a lucky coincidence! I'm trying to build a small C# library to support reading image types to learn about them, png was quite understandable but jpg is a little trickier, given I panic when I see maths.