Greetings
I'd really appreciate some help with my lack of understanding of the
visad model. I'm trying to display the postions (lat, long, alt) of some
weather stations as a learning exercise.
I'm getting the error
"RealType Longitude occurs more than once: ShadowType.testIndices"
when the Java 3D viewer comes up, and nothing else.
I assume that my logic is at fault (it was a strain just getting it to
compile).
{If I get this to work I next want to show the period of operation
(span) of the stations as a bar in the Z axis, rather than station
altitude.}
Here is the relevant bit of code I think:
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RealTupleType stationSpan = new RealTupleType(RealType.Latitude,
RealType.Longitude, RealType.Altitude);
int nstations=testquery.stations.size(); // the number of stations to
display
float span[][]=new float[3][nstations];
for (int i=0;i<nstations;i++){
WeatherStation current=(WeatherStation)
testquery.stations.elementAt(i);
span[0][i]=(float) current.latitude;
span[1][i]=(float) current.longitude;
span[2][i]=(float) current.altitude;
}
final DataReference stations_ref = new DataReferenceImpl("stations");
stations_ref.setData(new Gridded3DSet(stationSpan,span,nstations));
DisplayImpl display = new DisplayImplJ3D("image display");
// map earth coordinates to display coordinates
display.addMap(new ScalarMap(RealType.Latitude, Display.XAxis));
display.addMap(new ScalarMap(RealType.Longitude, Display.YAxis));
display.addMap(new ScalarMap(RealType.Altitude, Display.ZAxis));
display.addReference(stations_ref);
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Thanks for any advice
--
Matthew Laurenson
National Agriculture Research Center
Ministry of Agriculture, Forestry and Fisheries
3-1-1 Kannondai
Tsukuba
Ibaraki 305-8666
JAPAN
ph +81-298-38-7025
fax +81-298-38-8551
