Michael Sternberg created an amazing Atari disk data visualizer. It shows which of the disk’s tracks contains data.
Charles Mangin first did something like this for the Apple II. I thought of the idea of making an Atari version, and Michael ran with it.
The visualizer is a bash shell script that calls the ImageMagick convert and montage tools. The code is on github: https://github.com/m...ternberg/atrviz
It hasn't been tested yet on enhanced or dual-density ATR disk images.