Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

nt: 11 April 2018 19:02 > To: > j.m.greg...@reading.ac.uk<mailto:j.m.greg...@reading.ac.uk><mailto:j.m.greg...@reading.ac.uk<mailto:j.m.greg...@reading.ac.uk>> > Cc: > cf-metadata@cgd.ucar.edu<mailto:cf-metadata@cgd.ucar.edu><mailto:cf-metadata@cgd.ucar.edu<mailto:cf-

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

> From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Jim > Biard <jbi...@cicsnc.org> > Sent: 17 April 2018 14:04 > To: cf-metadata@cgd.ucar.edu > Subject: Re: [CF-metadata] Units of projection_x_coordinate values in > &q

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Jim Biard <jbi...@cicsnc.org> Sent: 17 April 2018 14:04 To: cf-metadata@cgd.ucar.edu Subject: Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection" So, should we consider

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

age- > From: CF-metadata [mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf > Of Randy Horne > Sent: 11 April 2018 19:02 > To: j.m.greg...@reading.ac.uk > Cc: cf-metadata@cgd.ucar.edu > Subject: Re: [CF-metadata] Units of projection_x_coordinate values in > "Geospati

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

.@reading.ac.uk > Cc: cf-metadata@cgd.ucar.edu > Subject: Re: [CF-metadata] Units of projection_x_coordinate values in > "Geospatial projection" > > Dear All: > > Unfortunately, for this projection, the relationship between m and rad is > non-linear

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

ged. > > Best wishes > > Jonathan > > - Forwarded message from Ethan Davis <eda...@ucar.edu> - > >> Date: Tue, 10 Apr 2018 11:59:55 -0600 >> From: Ethan Davis <eda...@ucar.edu> >> To: Jonathan Gregory <j.m.greg...@reading.ac.uk

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

te: Tue, 10 Apr 2018 11:59:55 -0600 > From: Ethan Davis <eda...@ucar.edu> > To: Jonathan Gregory <j.m.greg...@reading.ac.uk> > Cc: CF metadata <cf-metadata@cgd.ucar.edu> > Subject: Re: [CF-metadata] Units of projection_x_coordinate values in > "Geo

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

e from Jim Biard <jbi...@cicsnc.org> - > > > Date: Tue, 10 Apr 2018 12:32:00 -0400 > > From: Jim Biard <jbi...@cicsnc.org> > > To: CF metadata <cf-metadata@cgd.ucar.edu> > > Subject: Re: [CF-metadata] Units of projection_x_coordinate values in &

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

Hi. Is it possible that we just need to loosen the definition of projection_x_coordinate and projection_y_coordinate? Jim [image: CICS-NC] Visit us on Facebook *Jim Biard* *Research Scholar* Cooperative Institute for Climate and

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

Hi Randy, This projection was added to CF with Trac #72 . There's some discussion around the x,y coordinates. I think comment 12 from John Caron addresses the issue of using radians instead of meters:

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

ones. Best wishes Jonathan - Forwarded message from Jim Biard <jbi...@cicsnc.org> - > Date: Tue, 10 Apr 2018 12:32:00 -0400 > From: Jim Biard <jbi...@cicsnc.org> > To: CF metadata <cf-metadata@cgd.ucar.edu> > Subject: Re: [CF-metadata] Units of

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

Hi. It sounds like perhaps we should avoid the word "canonical". Perhaps we should change the relevant bit of the definition to read The x (abscissa) and y (ordinate) rectangular coordinates are identified by the standard_name attribute values projection_x_coordinate and projection_y_coordinate

Re: [CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

Ethan: What you suggest is fine. As an aside …. If you look at the CF standard name table, the canonical units for standard name “ projection_x_coordinate” and “projection_y_coordinate” are meters (not radians). The GOES-R designers (specifically me) inadvertently used these two standard

[CF-metadata] Units of projection_x_coordinate values in "Geospatial projection"

Hi all, The "Geostationary projection" section of Appendix F "Grid Mappings" says The x (abscissa) and y (ordinate) rectangular coordinates are identified by the standard_name attribute values projection_x_coordinate and projection_y_coordinate respectively. In the case of this projection, the