You found that Ghrist article but you didn't find this: https://www.math.upenn.edu/~ghrist/notes.html https://www.math.upenn.edu/~ghrist/notes.html ? Also I ha

You found that Ghrist article but you didn't find this: https://www.math.upenn.edu/~ghrist/notes.html https://www.math.upenn.edu/~ghrist/notes.html ? Also I haven't read it but: http://www.maa.org/press/maa-reviews/topological-signal-processing http://www.maa.org/press/maa-reviews/topological-signal-proc... There's also the entire field of 'computational geometry'.