Re: Help on Data Transect

Hi Antonio-

Antonio Benvenuti wrote:

I would like to implement a functionality like IDV's "Data Transect" in my
I am actually representing a base map from a netcdf file, mapping latitude,
longitude respectively on the Y, X axes and the altitude as RGB values.
Could you suggest me a way to do it?

The easiest thing would be too look through the
ucar.unidata.idv.control.DataTransectControl and work your
way back. But for a quick summary the IDV has:

3 Data References with RealTuples (XYZ) in them for the
selector points (two end points, one mid point).
1 Data Reference with a Gridded2DSet on a 1D manifold (for
the line)
ActionImpls that listen for changes when the selector points are
directly manipulated and update the postions of the line
and other points.

A listener on the line so that when it changes:
 - A sampling set of points along the line is generated
 - the data field is resamples along that line.

You could reinvent this all, or just use the pieces of the
IDV library that we've already developed.

Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307

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