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Hi Don,I am just getting ready to do something similar to what you are describing to use for visualizing a radar beam path and where it may possibly intersect with the terrain surrounding the radar.
I am still getting my feet wet with VisAD and had planned on using Ugo's example 6.6 from his tutorial as a guide. I was going to try and write a DEMViewer of sorts (but now that you have brought Ugo's DEMViewer to my attention, I may try to use his) and place a DataReferenceImpl in the DEM data.
One end of the line would be anchored at he radar site and the other end would be used to "sweep" around the X-Y 2D domain. The terrain along the line would be displayed in an adjacent window in an X-Z 2D display - again similar to Ugo's example 6.6.
(please see http://www.cimms.ou.edu/~kmanross/VCPRPE/NSSL_WDTB_VCPRPE-example.html for an idea of this project)
I don't know if I am adding much to your inquiry, but it sounds like I am working along the same lines as you are. Please feel free to contact me for additional questions.
-kevin. Don Murray wrote:
Hi-
It's been a while since I asked this question so just I'm
just probing the list to see if anyone has:
- developed a reader of USGS 7.5 minute DEM data that generates VisAD
objects. The purpose would be to:
- display the DEM as an isosurface, contour lines and or
mesh (like Ugo's DEMViewer does)
- create vertical topographic slices in any direction.
If no one has already done this, then I'd like some input
on the best way to structure the data. A depiction of the data
can be found at:
http://edc.usgs.gov/guides/images/dem/utm.gif
and a fuller description at:
http://edc.usgs.gov/guides/dem.html#spatial
Basically, it is comprised of a set of equally spaced profiles
along UTM easting line. Each profile may be a different length and the
UTM easting value (X) is constant. I was thinking of having
a FlatField of (UTM_X, UTM_Y) -> Z, but I'm not sure what
to use for the domain set. Maybe an Irregular2DSet of
float[num_UTMX_points][] and for each UTMX array, I would
have the number of UTM_Y points?
- Is anyone working on a GeoTIFF to VisAD adapter?
Thanks for the help.
Don
*************************************************************
Don Murray UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx P.O. Box 3000
(303) 497-8628 Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
*************************************************************
-- +------------------------------------------------------------+ Kevin L. Manross [KD5MYD] (405)-366-0557 CIMMS Research Associate kevin.manross@xxxxxxxx [NSSL-WRDD/SWATN] http://www.cimms.ou.edu/~kmanross "My opinions are my own and not representative of CIMMS, NSSL, NOAA or any affiliates" +------------------------------------------------------------+
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