Re: [visad] Hovmoller diagram

[Don Murray <Don.Murray@xxxxxxxx>]

Thanks, Bill.  I had tried using YAxisOffset and it sort of works, but I 
think I was missing computing the scale and offset.  Since I haven't 
used the offset spatial scalarmaps before, I guess I'll have to bone up 
on the caveats.

At least I'm on the right track!

Don

On 10/27/10 10:45 AM, hiding@xxxxxxxxx wrote:
> Hi Don,
>
> If the images are at evenly spaced time intervals
> you may simply be able to replace:
>
> Time -> Animation
>
> with:
>
> Time -> YAxisOffset
>
> with appropriately computed scale and offset. If
> the time intervals are not evenly spaced, then you
> may need to convert your data to something like:
>
> (Index -> (Time, ((ImageElement, ImageLine) -> Band1)))
>
> and replace:
>
> Time -> Animation
>
> with:
>
> Index -> YAxisOffset
>
> It will be a little work to compute proper scale
> and offset for the ScalarMap to YAxsOffset.
>
> Good luck and let us know if you have any problems.
>
> Bill
>
> -----Original Message-----
> From: Don Murray <Don.Murray@xxxxxxxx>
> To: visad@xxxxxxxxxxxxxxxx
> Sent: Wed, Oct 27, 2010 10:53 am
> Subject: [visad] Hovmoller diagram
>
> Hi All-
>
> I have a set of images that show the data of a narrow band of the earth.
> The MathType is:
>
> (Time-> ((ImageElement, ImageLine) -> Band1))
>
> with a CoordinateSystem of:
>
> (ImageElement, ImageLine) ==> (Latitude, Longitude)
>
> Normally, I map:
>
> Latitude->Y Axis
> Longitude -> X Axis
> Band1 -> RGB
> Time -> Animation
>
> to do a time animation of the images. What I would like to do is
> generate a Hovmoller diagram where Time is the Y axis and the images are
> stacked along in time, such as the image here:
>
> http://www.nhc.noaa.gov/gifs/gehov2.gif
>
> What ScalarMaps would I need and/or how would I need to munge the data
> to accomplish this?
>
> Thanks for your help.
>
> Don
> --
> Don Murray
> NOAA/ESRL/PSD and CIRES
> 303-497-3596
> http://www.esrl.noaa.gov/psd/people/don.murray/
>
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--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/