Different Projection Results in AWS Managed Services

[Greg Troxel]

proj over time has improvements, and these are usually viewed as
improvements and/or bug fixes.

For example, 9.2.0 has more NADCON grids:
  https://github.com/OSGeo/PROJ/releases/tag/9.2.0

To understand more, you're going to need to study release notes.

You really need to ask AWS about AWS configuration, rather than asking
us to guess.  You are getting all that cloud goodness which must be
perceived as valuable, and finding out what they are really doing is
part of the bargain.


The larger point is that getting upset about a small change in proj
output while not being at least 10x more upset about differences between
proj and NGS, and not having that being grounded in a thorough
understanding of the geodetic issues, just does not make any sense.
>From your responses so far, it sounds like there are still a lot of
open, far more serious issues:

  Is your data really in NAD83(1986)?

  Do you really want to transform to an ensemble?
    What do you think that means?

  Do you understand the dynamic datum issues, and the consequences of
  the lack of epoch tagging?