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 WSG84 to another . So Does > MITAB have been convert the coordsys from WSG84 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 Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/mitab/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
