private PointFeature nextFilteredDataPoint() throws IOException {
if (orgIter == null) return null;
if (!orgIter.hasNext()) return null;
PointFeature pdata = orgIter.next();
while (!filter(pdata)) {
if (!orgIter.hasNext()) return null;
pdata = orgIter.next();
}
return pdata;
}
public PointFeature next() throws IOException {
npts++;
return pfIter.next();
}
