I have been using Contour2DDisplayable in the past with success. The
Flat field has always been
lat, lon -> val
where val might be depth or whatever.
I am now trying to contour a field from a netcdf grid file. The IDV
does this Ok, but my image is simply a white polygon of the grid
itself. My code is this:
String netcdfUrl = args[0];
GeoGridDataSource ggds = new GeoGridDataSource(null, netcdfUrl, null);
GridDataset gds = ggds.getDataset();
GeoGrid gg = (GeoGrid)gds.getGrids().get(0);
GeoGridAdapter gga = new GeoGridAdapter( ggds, gg,
"surface_temperature" );
FieldImpl fi = gga.getData();
System.out.println( fi.getType().prettyString() );
which gives
(Time -> ((XC[unit:km], YC[unit:km]) -> surface_temperature[unit:Pa]))
Not sure why temp units are Pa??
FlatField ff = (FlatField)fi.getSample(1);
System.out.println( ff.getType().prettyString() );
which I presume extracts some time element, and gives
((XC[unit:km], YC[unit:km]) -> surface_temperature[unit:Pa])
Contour2DDisplayable cdd = new Contour2DDisplayable( "foo" );
cdd.setData( fi );
cdd.setContourLevels( new RegularContourLevels( 10, 273, 273, 310 ) );
// cdd.setColorPalette( cyans );
I cannot see what I am overlooking. Can the Contour2DDisplayable not
be used like this where the domain is not lat, lon?
Any help appreciated
Stuart
