How to create proj4 definition of local coordinatesystem

by CarLo91   Last Updated October 15, 2018 20:22 PM

i have to generate a proj4 definition string from affine transformation parameters (A-F).

For example:

I have a local coordinatesystem based on EPSG:31466

The affine parameter are:

  A = 0.933176825,
  B = -0.358394718,
  C = 2557551.066,
  D = 0.358262137,
  E = 0.933522886,
  F = 5635190.282

Coordinates of 31466:



coordinates of local coordinatesystem:



but how to translate the affine parameter to a proj4 string? i need it for gdal and geoserver

Answers 1

PROJ gurus--Please feel free to edit and/or add your own answer!

proj5 just added the ability to include an affine transformation to the transformation pipeline a few weeks ago (approximately 1 Oct 2018).

There's an ongoing project to add support for the transformation pipeline into GDAL and QGIS over the next months.

So, it's not there yet.

October 15, 2018 20:20 PM

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