Question

Custom projection defined as 3 degree polynomial transformation

  • 11 September 2018
  • 1 reply
  • 0 views
W

I have data in projection defined as 3 degree polynomial transformations to and from EPSG:2172.

x' = e0 + y e4 + x e1 + yy e7 + yx e5 + xx e2 + yyy e9 + yyx e8 + yxx e6 + xxx e3

y' = d0 + y d4 + x d1 + yy d7 + yx d5 + xx d2 + yyy d9 + yyx d8 + yxx d6 + xxx d3

I know this ex and dx coefficients to and from EPSG:2172

Is it possible to define such custom projection type in FME Desktop ?

1 reply

daveatsafe
Rank
Userlevel 2
Badge +17

Hi @wflorczykowski,

I'm sorry, FME's user coordinate system definitions support affine transformation, but not polynomial, and only for Lambert Conformal Conic and Transverse Mercator projections.

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