Dear Etienne
To summarise so far: the new parameters required are
horizontal_datum_name
towgs84 (an array of float or double, with 3,6 or 7 values)
prime_meridian_name
reference_ellipsoid_name
projected_coordinate_system_name
geographic_coordinate_system_name
coordinate system names are
Jonathan, thank you for your reply.
On Fri, Dec 30, 2011 at 10:06 AM, Jonathan Gregory
j.m.greg...@reading.ac.uk wrote:
Dear Etienne
Thanks for your posting of 13 Dec and apologies again for slow reply.
= In light of all this, could we add datum_name, datum_code and
towgs84 to
Dear Etienne
Thanks for your posting of 13 Dec and apologies again for slow reply.
= In light of all this, could we add datum_name, datum_code and
towgs84 to grid_mapping?
I think we should call it horizontal_datum_name (since there are also vertical
datums). We also need various other names
Dear Etienne
Thanks for your helpful email, and sorry for slow response.
Ok you mean that we could add new projections easily to the CF
standard? That's great to know.
Yes, you could do this with a trac ticket, like ticket 72, which proposes to
add the geos projection. See
Hi Jeff,
Do you know how Etienne can get access to trac?
thanks,
Karl
On 12/13/11 9:35 AM, Etienne Tourigny wrote:
Jon,
thanks for your answers
On Tue, Dec 13, 2011 at 1:42 PM, Jonathan Gregory
j.m.greg...@reading.ac.uk wrote:
Dear Etienne
Thanks for your helpful email, and sorry for
] Question on WKT representation of CRS
Anthony has graciously and rapidly created an account for me (I sent
an email to webmaster@)
Thanks,
Etienne
On Tue, Dec 13, 2011 at 7:40 PM, Karl Taylortaylo...@llnl.gov wrote:
Hi Jeff,
Do you know how Etienne can get access to trac?
thanks,
Karl
On 12/13/11
Ok you mean that we could add new projections easily to the CF
standard? That's great to know.
I'm not sure I understand your question - do you mean to ask if these
additions to CF would be sufficient to describe most WKT definitions
in pure CF metadata (without the WKT)?
By all means my
Jonathan Gregory j.m.greg...@reading.ac.uk
-
Date: Wed, 9 Nov 2011 09:56:01 +
From: Jonathan Gregory j.m.greg...@reading.ac.uk
To: cf-metadata@cgd.ucar.edu
Subject: Fwd: Re: [CF-metadata] Question on WKT representation of CRS
Dear all
It would be very helpful if those who are familiar
- Forwarded message from Jonathan Gregory j.m.greg...@reading.ac.uk
-
Date: Wed, 9 Nov 2011 09:56:01 +
From: Jonathan Gregory j.m.greg...@reading.ac.uk
To: cf-metadata@cgd.ucar.edu
Subject: Fwd: Re: [CF-metadata] Question on WKT representation of CRS
Dear all
It would be very
Subject: Re: [CF-metadata] Question on WKT representation of CRS
Hi,
I think the CF-approach of being self-explanatory rather than to rely
on external tables/database has worked very well so far. If I
understand this thread correctly, the question is how to describe a CRS.
I would rather like
: Heiko Klein heiko.kl...@met.no
To: Jonathan Gregory j.m.greg...@reading.ac.uk
Cc: cf-metadata@cgd.ucar.edu
Sent: Friday, October 07, 2011 12:44 AM
Subject: Re: [CF-metadata] Question on WKT representation of CRS
Hi,
I think the CF-approach of being self-explanatory rather than to rely
on external
Hi all,
Polite request: can folks not attach names - well, at least not mine! -
to message subject lines.
Although it may temporarily boost one's google rating :-) it can also
give the impression that the named person endorses the views and
opinions expressed in the message. Which may or may not
AM
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip)
Hi Bryan,
I suspect it probably is becoming important for weather forecast output
now.
At the Met Office, we're now generating 2km post-processed forecast data
(from models running at up 1.5km resolution
-metadata-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: 06 October 2011 14:26
To: cf-metadata@cgd.ucar.edu
Subject: [CF-metadata] Question on WKT representation of CRS
Dear all
I agree with Seth and Bryan in the point made earlier by Balaji
to the usual CF guidelines.
Hope this helps,
Jon
-Original Message-
From: cf-metadata-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Jonathan Gregory
Sent: 06 October 2011 14:26
To: cf-metadata@cgd.ucar.edu
Subject: [CF-metadata] Question on WKT
To: TOYODA Eizi toy...@gfd-dennou.org; Patrick Sunter
patdeve...@gmail.com; cf-metadata@cgd.ucar.edu
Sent: Wednesday, October 05, 2011 11:18 PM
Subject: RE: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip) (Kennedy, Paul)
Hi
nope (for me at least!). We do it regularly
Hi.
I worked in a previous career phase with photogrammetry and GIS.
Precise knowledge of the coordinate system is often critical in these
domains. I appreciate the concern about the opacity of the WKT or
proj4 text blocks, but I don't think it is wise to develop what will
amount to yet
Dear all
I agree that we should not reinvent in CF what has already been thought out
elsewhere if we can help it. This point is often made in the development of
CF. However I think we should restrict our attention to what is really needed
in CF i.e. for which there are already use-cases. In my
@cgd.ucar.edu
Sent: Thursday, October 06, 2011 1:42 AM
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip)
Hi Bryan,
I suspect it probably is becoming important for weather forecast
output now.
At the Met Office, we're now generating 2km post-processed forecast
data
ArcGIS already reads and writes netCDF but doesn't pay any attention to
the CF projection information as it stands.
Untrue, actually; as of v.9.3+, you can directly import CF-compliant NetCDF
as a raster using the Multidimension Tools. The map projection metadata
has to follow CF
-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip) (Kennedy, Paul)
Dears,
Is it difficult to register a new EPSG code? I'm curious since I
haven't
tried, but they seem trying to be open to new proposal.
Best Regards,
--
Eizi TOYODA
twitter.com
Message-
From: cf-metadata-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of TOYODA Eizi
Sent: Wednesday, October 05, 2011 9:16 AM
To: Kennedy, Paul; Patrick Sunter; cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip
in a normal workflow.
Cheers,
Dave
- Reply message -
From: Bryan Lawrence bryan.lawre...@ncas.ac.uk
Date: Wed, Oct 5, 2011 5:52 am
Subject: [CF-metadata] Question on WKT representation of CRS (Bentley, Philip)
To: cf-metadata@cgd.ucar.edu
Hi Seth
I haven't read all the threads ... but I
...@cgd.ucar.edu] On Behalf Of Bryan Lawrence
Sent: 05 October 2011 12:52
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley,Philip)
Hi Seth
I haven't read all the threads ... but I strongly agree with your last
paragraph!
I have had many conversations
Dear all
Patrick's example is useful.
DATUM[Geocentric_Datum_of_Australia_1994,
SPHEROID[GRS 1980,6378137,298.2572221010042,
AUTHORITY[EPSG,7019]],
TOWGS84[0,0,0,0,0,0,0],
AUTHORITY[EPSG,6283]],
PRIMEM[Greenwich,0],
...@cgd.ucar.edu] On Behalf Of Seth McGinnis
Sent: Wednesday, 5 October 2011 6:50 AM
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley, Philip)
On Tue, 4 Oct 2011 15:28:15 +0100
Jonathan Gregory j.m.greg...@reading.ac.uk wrote:
The CF convention
-metadata-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Seth McGinnis
Sent: Wednesday, 5 October 2011 6:50 AM
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley, Philip)
On Tue, 4 Oct 2011 15:28:15 +0100
Jonathan
McGinnis
Sent: Wednesday, 5 October 2011 6:50 AM
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Question on WKT representation of CRS
(Bentley, Philip)
On Tue, 4 Oct 2011 15:28:15 +0100
Jonathan Gregory j.m.greg...@reading.ac.uk wrote:
The CF convention as it stands can say a lot less
-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf Of Ethan Davis
Sent: 01 October 2011 07:49
To: CF metadata
Subject: [CF-metadata] Question on WKT representation of CRS
Hi Phil, all,
This latest round of discussion around using CRS WKT reminded
me of a few
metadata
Subject: Re: [CF-metadata] Question on WKT representation of CRS
Hi Ethan,
All good questions! I've provided some brief - and probably inadequate -
responses inline.
I've been working up an initial (reasonably concise) proposal covering
this topic, which potentially I could upload
Dear Phil
It's a good thing you're working on this and I'll be interested to see the
proposal. I'd like to anticipate what concerns I might have (of course these
are just my views) based on other initiatives to support the use of other
conventions in CF, which is obviously a good idea if we can
On Mon, Oct 3, 2011 at 11:04 PM, cf-metadata-requ...@cgd.ucar.edu wrote:
Message: 3
Date: Mon, 3 Oct 2011 12:49:42 +0100
From: Bentley, Philip philip.bent...@metoffice.gov.uk
Subject: Re: [CF-metadata] Question on WKT representation of CRS
To: Ethan Davis eda...@unidata.ucar.edu, CF
Hi Phil, all,
This latest round of discussion around using CRS WKT reminded me of a
few questions:
1) How easy is it to form a WKT that has good interoperability between
different client libraries?
I've had multiple WKT for the same CRS with differences in AUTHORITY,
AXIS, and a few other
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