Kevin-
Kevin Manross wrote:
I have had success with using Radar2DCoordinateSystem, but am having a
hard time with its 3D cousin.
if I construct a Radar3DCoordinateSystem with:
latitude: 32
longitude: -113
altitude: 0
Radar3DCoordinateSystem r3D = new Radar3DCoordinateSystem(32.0f,
-113.0f, 0.0f)
and I want to get the lat/lon/alt for a target at:
range: 100000m
azimuth: 90deg
elev: 2.0deg
double[][] targetCoordsRanAzElev = { {100000.0}, {90.0}, {2.0} };
and I use the toReference() method:
r3D.toReference(targetCoordsRanAzElev)
The values that I get back are the initial lat and lon (32, -113) and a
different height.
I just tried a test with this program:
import visad.bom.*;
public class RadarCSTest {
public static void main(String[] args) throws Exception{
Radar3DCoordinateSystem r3D
new Radar3DCoordinateSystem(32.0f, -113.0f, 0.0f);
double[][] targetCoordsRanAzElev = { {100000.0}, {90.0}, {2.0} };
double[][] lla = r3D.toReference(targetCoordsRanAzElev);
System.out.println("return = " + lla[0][0] + "," + lla[1][0] + "," +
lla[2][0]);
}
}
and got:
return = 32.0,-111.94030074226622,4273.730700664222
Which should be about right (due east and a little up).
Am I not using this class correctly? I tried reading through the
RadarAdapter.java code to see how Radar3DCoordinateSystem is used, but
the toReference() (nor the fromRefernce()) method is not called.
FWIW, my ScalarMaps are the following:
latMap = new ScalarMap(RealType.Latitude, Display.YAxis);
lonMap = new ScalarMap(RealType.Longitude, Display.XAxis);
altMap = new ScalarMap(RealType.Altitude, Display.ZAxis);
Thank you very much!
We use both R2DCS and R3DCS extensively in our IDV and it
seems to work fine.
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
"There's someone in my head, but it's not me" Roger Waters
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