[Proj] PROJ.4 and local coordinate systems

Maciej Sieczka tutey at o2.pl
Thu Aug 14 11:20:52 EDT 2008

joeri.theelen pisze:

> Is it possible to use PROJ.4 or any of its related tools to transform
> coordinates from a local carthesian system into another local carthesian
> system (thus both are not earth related).
> I inherit lots of datasets in many different formats for an archaeological
> site, with coordinates measured in two different local systems (shift in
> time). I managed to get the transformation parameters to transform sets of
> coordinates between both systems, with minor error. By transformation, I
> mean translation, rotation and dilation (scale factor) of the X/Y
> coordinates only, not height.
> I also managed to get the transformation parameters from both local systems
> to the UTM system in use in that area. Thus, transforming from local to UTM
> to local would be an option as well.
> Can anybody help me with this? I know programming such a tranformation would
> be trivial, but I need the power and flexibility of a tool like "cs2cs" to
> cope with the many different formats I am facing.


As *it seems* there is no such functionality in PROJ, maybe you would be 
ineterested in GRASS v.transform [1] module. You can load ASCII data 
into GRASS with v.in.ascii.



Maciej Sieczka

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