Frank Warmerdam,
Thank you for your reply immediately! Now from you I know
that the convertion the coordination system from WGS84 to another
system such as GAUS will depend on the OGR and PROJ.But why we use
ORG and Proj,can we only use Proj ?Because we know that the Proj is
used for the coordination system convertion.
Thank You again!Best wish
from sunxiaoming_2002
--- In [email protected], Frank Warmerdam <[EMAIL PROTECTED]> wrote:
>
> sunxiaoming_2002 wrote:
> >
> >
> > As we all know that thd coordsys the data receive from the GPS
machine
> > is WSG84.And wo should convert it from WGS84 to another . So
Does
> > MITAB have been convert the coordsys from WGS84 to another? Or
have not?
> >
> > I haven't found any code about the projection of coordsys in
MITAB dir.
> >
> > Thank You!!
>
> Sunxiaoming,
>
> MITAB uses the OGR API for various tasks, including coordinate
system
> related issues. The use of OGR for representing coordinate
systems,
> and doing reprojection and datum conversion is discussed at:
>
> http://www.gdal.org/ogr/osr_tutorial.html
>
> Note that you will need PROJ.4 properly installed in your
environment
> (used by OGRCoordinateTransformation) in order to actually apply
> datum shifts.
>
> MapInfo datum definitions include the TOWGS84[] information, so in
> theory conversion between datums should be relatively straight
forward.
>
> Best regards,
> --
> ---------------------------------------+---------------------------
-----------
> I set the clouds in motion - turn up | Frank Warmerdam,
[EMAIL PROTECTED]
> light and sound - activate the windows |
http://pobox.com/~warmerdam
> and watch the world go round - Rush | Geospatial Programmer for
Rent
>
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