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[netCDFJava #CIB-907867]: issue with mercator projection

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  • Subject: [netCDFJava #CIB-907867]: issue with mercator projection
  • Date: Thu, 21 Aug 2014 10:53:37 -0600
Hi Ghansham:

Are you sure you need Mercator with elliptical earth, and not Transverse 
Mercator (which uses an elliptical earth) ?

If you are sure, we would welcome a contribution from you to add that 
projection. Best would be if you can do a pull request directly on the github 
repository. Use the 4.5.3 branch would be best.

Thank you,
John

> I tried to go through the code and actual the issue is related to the fact
> that ucar.unidata.geoloc.projection.Mercator assumes eartg shape to be
> spherical while I expect it to be ellipsoidal with semi-major and
> semi-minor axes. I can add in the proj4 mercator implementation which
> allows semi major and minor axes for defining ellipsoidal shape with test
> dataset. And we can modify the ucar.nc2.dataset.transform.Mercator to pick
> ellipsoidal implementation when semi-major an minor axes is specified.
> Waiting to hear your point of view on this.
> regards
> Ghansham
> address@hidden> wrote:
> 
> >
> > Ghansham Sangar,
> >
> > Your Ticket has been received, and a Unidata staff member will review it
> > and reply accordingly. Listed below are details of this new Ticket. Please
> > make sure the Ticket ID remains in the Subject: line on all correspondence
> > related to this Ticket.
> >
> >     Ticket ID: CIB-907867
> >     Subject: issue with mercator projection
> >     Department: Support netCDF Java
> >     Priority: Normal
> >     Status: Open
> >
> >
> >
> > Please let us know how we can assist you further.
> >
> > Unidata User Support
> >
> >
> 
> 


Ticket Details
===================
Ticket ID: CIB-907867
Department: Support netCDF Java
Priority: Normal
Status: Open