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I am studying some early nineteenth century maps by Aaron Arrowsmith
that show projection grids (graticules), but do not state what
projection was used. I was wondering if someone has developed
software to ascertain map projections based on the lines of the
grid. I would think that it would be fairly easy to develop
something like this, but have not been able to turn up anything via
Google. Any leads?
David Allen
(Stony Brook University, Emeritus)