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[CF-metadata] attributes for min/max data values for visualization

From: Julia Collins <collinsj>
Date: Mon, 9 Jun 2008 11:38:11 -0600 (MDT)

On Mon, 9 Jun 2008, Jon Blower wrote:
> I have rediscovered this conversation in the depths of my inbox and
> thought it might be worth resurrecting. To summarize the discussion
> so far:
>
> 1) I proposed two new standard optional CF attributes (called
> something like minimum_data_value and maximum_data_value) that would
> be attached to a variable in a NetCDF file, redundantly holding its
> actual min and max values in that file. [...] As well as helping with data
> mining applications, this would act as a hint to visualization
> packages to provide a first attempt at automatically defining a colour
> scale range for sensible portrayal. Note that this attribute pair is
> distinct in purpose from valid_min and valid_max (which contains
> theoretical extrema, beyond which data is considered invalid).

I support the idea of formalizing these sorts of attributes in some
way. However, I would prefer a simpler name(s). For example: "actual_min"
and "actual_max." Less typing :-), and more like the existing "valid_min"
and "valid_max" attributes.

Julia
--
Julia Collins
National Snow and Ice Data Center
CIRES, University of Colorado, Boulder
449 UCB
Boulder, CO 80309-0449
Voice: 303-492-6405
E-mail: collinsj at nsidc.org
Received on Mon Jun 09 2008 - 11:38:11 BST

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