Hi Tom-
Thanks for the tip. At a first pass, I'm just looking at how to map the
image data, so I'm not too concerned with the map lines at this point.
It is more of a general question about how to do hovmollers and I think
you've both given me a nudge in the right direction.
Thanks!
Don
On 10/27/10 11:10 AM, Tom Rink wrote:
Trickier part might be using YAxisOffset with the map boundaries, the ugly
way: lon,lat -> elem,line and duplicate those at each index in the field
structure
that Bill suggested.
Don Murray wrote:
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/
_______________________________________________
visad mailing list
visad@xxxxxxxxxxxxxxxx
For list information, to unsubscribe, visit:
http://www.unidata.ucar.edu/mailing_lists/
--
Don Murray
NOAA/ESRL/PSD and CIRES
303-497-3596
http://www.esrl.noaa.gov/psd/people/don.murray/
