Re: [CF-metadata] Standard name for land/sea mask

2018-03-15 Thread John Graybeal 
It does rather seem that you’ve waited long enough. I’m in favor!

john

---
John Graybeal
jbgrayb...@mindspring.com

> On Mar 15, 2018, at 07:35, Elodie Fernandez 
>  wrote:
> 
> Dear all,
> 
> My proposal from July 11th for a new standard name "sea_binary_mask" hasn't 
> raised much discussion. Is there a chance it could be included in the next 
> table update?
> 
> Regards,
> Elodie
> 
> On 23/08/2017 11:07, Elodie Fernandez wrote:
>> Dear all,
>> 
>> My proposal for a new standard name "sea_binary_mask" hasn't raised much 
>> discussion. Is there a chance it could be included in the next table update?
>> 
>> Regards,
>> Elodie
>> 
>> On 11/07/2017 09:55, Elodie Fernandez wrote:
>>> Dear all,
>>> 
>>> I would like to suggest the addition of a new standard_name to describe 
>>> land-sea masks. A standard_name already exists: land_binary_mask (
>>> X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land, 0 = 
>>> sea.). But in the ocean modelling community, we have already existing files 
>>> describing those masks, but from an "ocean point of view", so 1 is for sea 
>>> and 0 is for land points.
>>> So I would like to request the addition of the standard_name 
>>> "sea_binary_mask", 
>>> with definition "X_binary_mask has 1 where condition X is met, 0 elsewhere. 
>>> 1 = sea, 0 = land" and unit "1".
>>> 
>>> Best regards,
>>> Elodie 
>>> 
>>> Click here  to 
>>> report this email as spam.
>>> 
>>> 
>>> 
>>> ___
>>> CF-metadata mailing list
>>> CF-metadata@cgd.ucar.edu 
>>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata 
>>> 
>> 
>> 
>> 
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> 
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Re: [CF-metadata] Standard name for land/sea mask

2018-03-15 Thread Elodie Fernandez 
Dear all,

My proposal from July 11th for a new standard name "*sea_binary**_mask*"
hasn't raised much discussion. Is there a chance it could be included in
the next table update?

Regards,
Elodie

On 23/08/2017 11:07, Elodie Fernandez wrote:
> Dear all,
>
> My proposal for a new standard name "*sea_binary**_mask*" hasn't
> raised much discussion. Is there a chance it could be included in the
> next table update?
>
> Regards,
> Elodie
>
> On 11/07/2017 09:55, Elodie Fernandez wrote:
>> Dear all,
>>
>> I would like to suggest the addition of a new standard_name to
>> describe land-sea masks. A standard_name already exists:
>> land_binary_mask (
>> X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land,
>> 0 = sea.). But in the ocean modelling community, we have already
>> existing files describing those masks, but from an "ocean point of
>> view", so 1 is for sea and 0 is for land points.
>> So I would like to request the addition of the standard_name
>> "*sea_binary**_mask*",
>> with definition "X_binary_mask has 1 where condition X is met, 0
>> elsewhere. 1 = sea, 0 = land" and unit "1".
>>
>> Best regards,
>> Elodie
>>
>> Click here 
>> to report this email as spam.
>>
>>
>>
>> ___
>> CF-metadata mailing list
>> CF-metadata@cgd.ucar.edu
>> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
>
>
>
> ___
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> http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata

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Re: [CF-metadata] Standard name for land/sea mask

2017-07-11 Thread Jonathan Gregory 
Dear Jim

I agree that for some purposes you want a field of integers that identifies the
area types, rather than a binary mask. I think this can be achieved by using
the existing standard_name of area_type. This standard_name indicates a string-
valued data variable, but it can be encoded as self-describing integers with
flag_values and flag_meanings, as you say.

Best wishes

Jonathan

- Forwarded message from Jim Biard <jbi...@cicsnc.org> -

> Date: Tue, 11 Jul 2017 09:33:54 -0400
> From: Jim Biard <jbi...@cicsnc.org>
> To: cf-metadata@cgd.ucar.edu
> Subject: Re: [CF-metadata] Standard name for land/sea mask
> User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:52.0)
>   Gecko/20100101 Thunderbird/52.2.1
> 
> Hi.
> 
> Given the prior existence of land_binary_mask, Elodie's request for
> sea_binary_mask makes sense. Even given my request below, if Elodie
> needs this standard name, I endorse it's addition. I don't want to
> bog her down.
> 
> I'd like to suggest that we do something slightly more flexible and
> create the standard name discrete_mask, which could handle both
> these cases. It could also handle numerous other use cases that
> generally go without a standard name right now. The definition could
> be something like below.
> 
>discrete_mask: A variable with the standard name discrete_mask is
>used to indicate a finite set of discrete, related conditions that
>hold across the dimensional range of the variable. These conditions
>are marked by integer values, each of which indicates a specific
>condition. The particular conditions being indicated are defined
>using flag_values and flag_meanings attributes associated with the
>variable. A single element of the variable can indicate only one
>condition - bit field combinations are not allowed.
> 
> 
> I'm thinking this way because in the particular domain Elodie is
> referring to, some files have trinary masks, sea = 0, coast = 1,
> land = 2, different ones define the numbers used to indicate the
> different conditions, some cover more cases (fresh water, for
> example), etc.
> 
> I do, on one level, appreciate that it can be nice to see the
> standard name on a variable and not need to look further to
> understand how the contents are implemented, but I don't think it
> buys us near as much as we like to think.
> 
> Grace and peace,
> 
> Jim
> 
> On 7/11/17 3:55 AM, Elodie Fernandez wrote:
> >Dear all,
> >
> >I would like to suggest the addition of a new standard_name to
> >describe land-sea masks. A standard_name already exists:
> >land_binary_mask (
> >X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 =
> >land, 0 = sea.). But in the ocean modelling community, we have
> >already existing files describing those masks, but from an "ocean
> >point of view", so 1 is for sea and 0 is for land points.
> >So I would like to request the addition of the standard_name
> >"*sea_binary**_mask*",
> >with definition "X_binary_mask has 1 where condition X is met, 0
> >elsewhere. 1 = sea, 0 = land" and unit "1".
> >
> >Best regards,
> >Elodie
> >
> >
> >___
> >CF-metadata mailing list
> >CF-metadata@cgd.ucar.edu
> >http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
> 
> -- 
> CICS-NC <http://www.cicsnc.org/> Visit us on
> Facebook <http://www.facebook.com/cicsnc> *Jim Biard*
> *Research Scholar*
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> North Carolina State University <http://ncsu.edu/>
> NOAA National Centers for Environmental Information <http://ncdc.noaa.gov/>
> /formerly NOAA’s National Climatic Data Center/
> 151 Patton Ave, Asheville, NC 28801
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Re: [CF-metadata] Standard name for land/sea mask

2017-07-11 Thread Lowry, Roy K. 
Dear Jim,


Just for information there are three other binary mask Standard Names 
(surface_snow_binary_mask, sunlit_binary_mask and cloud_binary_mask) providing 
a precedent for Elodie's proposal so as you say sea_binary_mask should be added 
to the collection.


Regarding your generic mask suggestion I'm not sure it gains us much as there 
can't be that many candidates out there for additional Standard Names. It also 
causes me some interoperability concerns - automated aggregation of files would 
complicated significantly by such generic labels.


For the more complex categorisation there is already a mechanism in CF, namely 
the area_type Standard Name and vocabulary. I'm not sure opening the gates to 
multiple variations on this themes would help users of the standard.


Cheers, Roy.


Please note that I partially retired on 01/11/2015. I am now only working 7.5 
hours a week and can only guarantee e-mail response on Wednesdays, my day in 
the office. All vocabulary queries should be sent to enquir...@bodc.ac.uk. 
Please also use this e-mail if your requirement is urgent.



From: CF-metadata <cf-metadata-boun...@cgd.ucar.edu> on behalf of Jim Biard 
<jbi...@cicsnc.org>
Sent: 11 July 2017 14:33
To: cf-metadata@cgd.ucar.edu
Subject: Re: [CF-metadata] Standard name for land/sea mask


Hi.

Given the prior existence of land_binary_mask, Elodie's request for 
sea_binary_mask makes sense. Even given my request below, if Elodie needs this 
standard name, I endorse it's addition. I don't want to bog her down.

I'd like to suggest that we do something slightly more flexible and create the 
standard name discrete_mask, which could handle both these cases. It could also 
handle numerous other use cases that generally go without a standard name right 
now. The definition could be something like below.

discrete_mask: A variable with the standard name discrete_mask is used to 
indicate a finite set of discrete, related conditions that hold across the 
dimensional range of the variable. These conditions are marked by integer 
values, each of which indicates a specific condition. The particular conditions 
being indicated are defined using flag_values and flag_meanings attributes 
associated with the variable. A single element of the variable can indicate 
only one condition - bit field combinations are not allowed.

I'm thinking this way because in the particular domain Elodie is referring to, 
some files have trinary masks, sea = 0, coast = 1, land = 2, different ones 
define the numbers used to indicate the different conditions, some cover more 
cases (fresh water, for example), etc.

I do, on one level, appreciate that it can be nice to see the standard name on 
a variable and not need to look further to understand how the contents are 
implemented, but I don't think it buys us near as much as we like to think.

Grace and peace,

Jim

On 7/11/17 3:55 AM, Elodie Fernandez wrote:
Dear all,

I would like to suggest the addition of a new standard_name to describe 
land-sea masks. A standard_name already exists: land_binary_mask (
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land, 0 = sea.). 
But in the ocean modelling community, we have already existing files describing 
those masks, but from an "ocean point of view", so 1 is for sea and 0 is for 
land points.
So I would like to request the addition of the standard_name "sea_binary_mask",
with definition "X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = 
sea, 0 = land" and unit "1".

Best regards,
Elodie


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NOAA National Centers for Environmental Information <http://ncdc.noaa.gov/>
formerly NOAA’s National Climatic Data Center
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Re: [CF-metadata] Standard name for land/sea mask

2017-07-11 Thread Jim Biard 

Hi.

Given the prior existence of land_binary_mask, Elodie's request for 
sea_binary_mask makes sense. Even given my request below, if Elodie 
needs this standard name, I endorse it's addition. I don't want to bog 
her down.


I'd like to suggest that we do something slightly more flexible and 
create the standard name discrete_mask, which could handle both these 
cases. It could also handle numerous other use cases that generally go 
without a standard name right now. The definition could be something 
like below.


   discrete_mask: A variable with the standard name discrete_mask is
   used to indicate a finite set of discrete, related conditions that
   hold across the dimensional range of the variable. These conditions
   are marked by integer values, each of which indicates a specific
   condition. The particular conditions being indicated are defined
   using flag_values and flag_meanings attributes associated with the
   variable. A single element of the variable can indicate only one
   condition - bit field combinations are not allowed.


I'm thinking this way because in the particular domain Elodie is 
referring to, some files have trinary masks, sea = 0, coast = 1, land = 
2, different ones define the numbers used to indicate the different 
conditions, some cover more cases (fresh water, for example), etc.


I do, on one level, appreciate that it can be nice to see the standard 
name on a variable and not need to look further to understand how the 
contents are implemented, but I don't think it buys us near as much as 
we like to think.


Grace and peace,

Jim

On 7/11/17 3:55 AM, Elodie Fernandez wrote:

Dear all,

I would like to suggest the addition of a new standard_name to 
describe land-sea masks. A standard_name already exists: 
land_binary_mask (
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land, 0 
= sea.). But in the ocean modelling community, we have already 
existing files describing those masks, but from an "ocean point of 
view", so 1 is for sea and 0 is for land points.
So I would like to request the addition of the standard_name 
"*sea_binary**_mask*",
with definition "X_binary_mask has 1 where condition X is met, 0 
elsewhere. 1 = sea, 0 = land" and unit "1".


Best regards,
Elodie


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Cooperative Institute for Climate and Satellites NC 
North Carolina State University 
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151 Patton Ave, Asheville, NC 28801
e: jbi...@cicsnc.org 
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[CF-metadata] Standard name for land/sea mask

2017-07-11 Thread Elodie Fernandez 
Dear all,

I would like to suggest the addition of a new standard_name to describe
land-sea masks. A standard_name already exists: land_binary_mask (
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = land, 0 =
sea.). But in the ocean modelling community, we have already existing
files describing those masks, but from an "ocean point of view", so 1 is
for sea and 0 is for land points.
So I would like to request the addition of the standard_name
"*sea_binary**_mask*",
with definition "X_binary_mask has 1 where condition X is met, 0
elsewhere. 1 = sea, 0 = land" and unit "1".

Best regards,
Elodie
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