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 Thu Jul 08 2004 - 19:07:29 EDT