Quote:
Originally Posted by DuckieTigger
You are correct, pixels are not always square. And when they are not the horizontal and vertical resolution (ppi) is different. Across the diagonal is something else entirely, especially as the angle changes with aspect ratio of the entire screen. If you only allow a non-aliased line as diagonal, then that line is only made up by as many pixels as the longer of both sides has. In 600x800 screen that would be 800.
It makes absolutely no sense to say that the screen has 167ppi diagonally.
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No disrespect, but you are confused by the nomenclature being used. The industry standard is to give a diagonal ppi measurement. Whether it makes sense are not is totally irrelevant as it is the industries standard measurement, like it or not.