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Determining an unknown projection?

Question asked by mhleander@comcast.net on May 20, 2018
Latest reply on May 21, 2018 by mhleander@comcast.net

I have two versions of data from the same set of points, however the points are not aligned with one another using the same projection system for both.  I have determined one set of data to be "correct" in the expected coordinate system.  I believe the problem is that the "errant" data results from the mishandling of the projection system.  Is it possible to take the two sets of x/y's and the correct projection system and determine what projection system must have been mistakenly used? If this can be determined, I might be able to re-project the errant data so that it aligns with what I believe to be the "correct" data.

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