Hi Randy,
On Jun 1, 2017, at 12:28 PM, Randy Horne
<rhorne@xxxxxxxxxxxxxxxxx<mailto:rhorne@xxxxxxxxxxxxxxxxx>> wrote:
(1)
I have one overarching question.
Boiling down what you have written down, I think you are asking the CF standard
to be extended to include several swath feature types: multibandSwath,
multibandImageSwath, swath, imageSwath, profileSwath, multibandProfileSwath,
FORProfileSwath - as you allude to in the beginning of the paper. Is this
correct ?
Yes. At this point I am not sure exactly what part of the proposal will make it
into the CF convention but the intention is to have a chapter on swath data in
there like for the Discrete Sampling Geometries.
One other issue worth mentioning …
(2)
In the interest in NOT letting a mistake we made in the application of CF
conventions to GOES-R products represented on a standard angular grid,
propagate to swaths ….
When you declare that projection_x_coordinate and projection_y_coordinate have
units = “radians”. This is not allowed because the canonical units for these
standard_names are meters. If I had to do it over again, I would have asked
for new standard names, something like projection_x_angular_coordinate and
projection_y_angular_coordinate.
Thanks! I admit not checking what the canonical units were for these two
standard names.
How is this for the new standard name proposal:
projection_x_angular_coordinate
Canonical units: radian
Definition: "x" indicates a vector component along the grid x-axis, when this
is not true longitude, positive with increasing x. Angular projection
coordinates are angular distances in the x- and y-directions on a plane onto
which the surface of the Earth has been projected according to a map
projection. The relationship between the angular projection coordinates and
latitude and longitude is described by the grid_mapping.
-Aleksandar
