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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