Hi Don,
Thank you for your reply.
> You can ask the RpfLayer for it's RpfCoverageProvider, and then ask it
> for it's coverage over a specific area. Those coverages will tell you
> what scale you need to view that data. The coverage will viewable at
> that scale * or / by the scaleFactor of that value.
Ok, I have tried that, but it doesn't quite do what I am looking for. Here
is the code that I used:
for (int i = 0; i < layers.length; i++) {
if (layers[i] instanceof RpfLayer) {
RpfLayer rpf = (RpfLayer)layers[i];
RpfFrameProvider fProvider =
rpf.getFrameProvider();
Vector cvgs =
fProvider.getCoverage((float)minLat, (float)minLon, (float)maxLat,
(float)maxLon, (CADRG)proj);
for (int j=0; j<cvgs.size(); j++) {
RpfCoverageBox box =
(RpfCoverageBox)cvgs.get(j);
System.out.println(layers[i].getName() + "
scale from coverage = "+box.scale);
minScale = Math.min(minScale, box.scale);
}
}
}
Unfortunately there area never any coverages for this bounding box, because
it covers such a small area...
I tried replacing the Vecor cvgs line with : Vector cvgs =
rpf.getCoverageBoxes(); However, this Vector is always empty.
I guess what am looking for (ideally!) is to be able to specify a point,
and ask at what scales will this point have rpf coverage. Is there anything
in the API that can help me achive this?
Thanks,
Laura
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Received on Mon Mar 07 2005 - 09:33:57 EST