@marqh It's a non-trivial way of specifying that you're in an arbitrary
coordinate system, but it might be sufficient. However, for this to work, I
would suggest to give some example (and/or references) to build on. The most
accessible examples of Engineering CRS that I've found so far are given at
http://docs.opengeospatial.org/is/12-063r5/12-063r5.html#78. For a general
theoretical x/y coordinate system I believe we should then provide a WKT as
something like
EDATUM[“Arbitrary Cartesian Reference System",ANCHOR[“Reference Point”]],
CS[Cartesian,2],
AXIS[“projection_x”,east,ORDER[1]],
AXIS[“projection_y”,north,ORDER[2]],
LENGTHUNIT[“metre”,1.0]]
Hm, even this WKT string suggests that X axis is pointing East and Y axis is
point North which may be unknown or irrelevant. Not sure, whether we can make
it even more generic and neutral.
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