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20040319: Creating a vertical profile

>From: "Paul Gifford" <address@hidden>
>Organization: 
>Keywords: 200403190827.i2J8RdrV009672  IDV independent profile

Hi Paul-

>  I'm trying to create a vertical profile from a mapping of heights and
>values for a single spatial point.  I put something together but I obviously
>did it wrong since I'm getting an exception:
>
>************************
>ControlDescriptor.Creating display
>Invalid Units for timeSet
>visad.VisADException: Invalid Units for timeSet
>        at visad.DateTime.timeSetToArray(DateTime.java:493)
>        at
>ucar.unidata.data.grid.GridDataInstance.init(GridDataInstance.java:149)
>        at
>ucar.unidata.data.grid.GridDataInstance.<init>(GridDataInstance.java:113)
>        at
>ucar.unidata.idv.control.GridDisplayControl.doMakeDataInstance(GridDisplayCo
>ntrol.java:155)
>        at
>ucar.unidata.idv.control.DisplayControlImpl.setData(DisplayControlImpl.java:
>1096)
>        at
>ucar.unidata.idv.control.ProfileControl.setData(ProfileControl.java:199)
>        at
>ucar.unidata.idv.control.ProfileControl.init(ProfileControl.java:173)
>
> etc etc
>******************************

First, you found a bug (or really just bad coding), which I've fixed
so this exception won't be thrown.  

>I'm not sure why I'm getting this exception since time is not involed.  I
>guess it should be; I just don't know where.  So do you have any tips on
>taking a map of height->value and putting it in a form the ProfileControl
>can use?

The vertical profile control right now expects a grid that gets 
resampled to create the profile which is passed to the display.  That
grid would look like:

(lat,lon,alt) -> (value)

When the probe is moved, then it resamples to a grid of 
(alt -> value).  The only solution I could suggest would be
to create a 3D grid of:

(lat,lon,alt) -> value

and pass that in.  I'll ponder this a bit more and if I think
of a better solution, I'll let you know.  If the above doesn't
work, let me know.

Don
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