[GRASS-user] v.import and v.proj errors
hellik at web.de
Tue Aug 2 09:16:57 PDT 2016
>would be anyway useful to clarify what this "datum_trans" option means.
an example of the datum Hermannskogel  aka MGI .
this datum goes back to the Austrian-Hungary monarchy which covered the area
of Austria, Hungary, Slovenia, etc.
this datum was used in all these countries, but adapted for several regions
(have look at ).
this means that you can use the MGI datum for Austria, the Balcan countries
etc, but you have to use different +towgs parameters adapted for the
respective regions/countries which is needed for reprojection.
and here the "datum_trans" option is needed to define these different +towgs
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