[Proj] puzzled with +towgs84=... being ignored

Andre Joost andre+joost at nurfuerspam.de
Thu Jan 9 23:55:05 EST 2014

Am 10.01.2014 01:28, schrieb J. Luis:
> I'm very lost with this results where setting the +towgs84 is ignored
> unless I set "+datum=WGS84"
> Why so? and why is the source "+ellps=WGS84" ignored as well?

This is the usual behaviour: +towgs84 is only used when a datum shift is 
defined on both sides (from and to), either by specifying


Andre Joost

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