Thanks a lot. This works great. For posterity I'm
attaching below sample GridDataLayer that I used for
testing. Welcome any other comments you or others may
have, I can there's a better way to do this.
However, I am getting a java.lang.StackOverflowError
when I create an OMGridData.Int that is 51x51 in size
(2601 values). Any ideas on how to correct that?
TIA
Here's my sample
public static class GridLayer extends Layer {
private OMGraphicList omgraphics;
public GridLayer() {
omgraphics = new OMGraphicList();
createGrid(omgraphics);
}
private OMGraphicList createGrid(OMGraphicList
graphics)
{
int[][] data = new int[10][10];
for (int i=0; i<10; i++) {
for (int j = 0; j < 10; j++) {
data[i][j] = 0xCCFFFF00;
}
}
OMGridData.Int gridData = new
OMGridData.Int(data);
float vRes = (42.0f - 35.5f)/10.0f;
float hRes = (120.5f - 71.0f)/10.0f;
OMGrid omGrid = new OMGrid(35.5f, -120.5f,
vRes, hRes, gridData);
SimpleColorGenerator gen = new
SimpleColorGenerator();
omGrid.setGenerator(gen);
graphics.addOMGraphic(omGrid);
return graphics;
}
public void paint(java.awt.Graphics g) {
omgraphics.render(g);
}
public void projectionChanged(ProjectionEvent e) {
omgraphics.project(e.getProjection(), true);
repaint();
}
}
--- Don Dietrick <dietrick_at_bbn.com> wrote:
> There's an OMGrid object that handles this
> situation. You create one
> where the grid should be overlayed, and give it an
> OMGridGenerator that
> creates OMGraphics from the data values within the
> grid. There are
> example OMGridGenerators in the package.
>
> I think you might want to check out the version from
> CVS, I did some
> work this year on OMGrids that might make it easier
> to use them for
> your data values. CVS instructions are on the
> website download page.
>
> There is more information about OMGrids in the
> javadocs.
>
> Regards,
>
> Don
>
> On Jul 8, 2004, at 5:02 PM, serrotam wrote:
>
> >
> > I would appreciate advice on how to approach the
> > rendering of a (2D)grid of values that need to be
> > rendered as an overlay on a lat-lon map.
> >
> > grid of values can be as large a 2000x2000 where
> > each value will correspond to a colored square of
> a
> > few kilometers each.
> > ____________________________
> > | red | yellow | green | ...
> >
> > | red | green | yellow | ...
> > | yellow | red | green | ...
> > | : | : | : | ...
> >
> > Which is the most efficient way of creating this
> > layer? I.e. with an OMRaster or OMPolygons?
> >
> > What are good examples for setting OMRaster
> > projections? these are still a bit confusing to
> me.
> > appreciate any hints.
> > TIA
> >
> >
> >
> > __________________________________
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> >
>
>
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
> Don Dietrick, dietrick_at_bbn.com
> BBN Technologies, Cambridge, MA
> =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
>
>
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Received on Tue Jul 13 2004 - 19:25:52 EDT