[CF-metadata] Response to [lc-cci] proposal for new CF standard names for land cover observation and classification
Hessel.Winsemius at deltares.nl
Tue May 1 06:07:00 MDT 2012
Dear CF maintainers,
I would like to acknowledge that we also are interested in similar
variable names as posted by mr. Martin Boettcher. The subject of the
previous post was:
[CF-metadata] [lc-cci] proposal for new CF standard names for land cover
observation and classification
In particular we are interested (and I quote) in:
>/ standard name: probability_of_water_occurrence
/>/ definition: probability that the observed pixel shows water
/>/ unit: none (a value between 0 and 1)/
and along with this a standard name, which defines the quality of this
estimate, using a modifier. The suggestion by mr. Boettcher was:
>/ standard name modifier: confidence_level
/>/ definition: applied to some discrete variable, denotes the probability that the assignment of the value to the variable is correct
Our variable name for the quality would then become:
There was some inclarity as to what 'probability of water occurrence'
means. In our case, we are preparing an operational automated service
for flood mapping from EnviSAT ASAR satellite data (in the future, we'll
use Sentinel-1). In our algorithms, each pixel is given a probability
that it contains open water. We are never 100% sure that a pixel is land
or water. Therefore, we need a 'probability' instead. The ability of our
algorithm to distinguish between land or water is sometimes good and
sometimes not. Therefore we need the 'confidence_level'.
Does this clarify our case? Please let me know if any clarifications are
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