Scale moderator not in line with sinusoidal projector
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Key: LUCENE-1930
URL: https://issues.apache.org/jira/browse/LUCENE-1930
Project: Lucene - Java
Issue Type: Bug
Components: contrib/spatial
Affects Versions: 2.9
Reporter: Nicolas Helleringer
Current implementation in spatial Lucene does :
public double getTierBoxId (double latitude, double longitude) {
double[] coords = projector.coords(latitude, longitude);
double id = getBoxId(coords[0]) + (getBoxId(coords[1]) /
tierVerticalPosDivider);
return id ;
}
private double getBoxId (double coord){
return Math.floor(coord / (idd / this.tierLength));
}
with
Double idd = new Double(180);
in the CartesianTierPlotter constructor.
But current Sinusoidal Projector set and used in initialisation of
CartesianTierPlotter does :
public double[] coords(double latitude, double longitude) {
double rlat = Math.toRadians(latitude);
double rlong = Math.toRadians(longitude);
double nlat = rlong * Math.cos(rlat);
double r[] = {nlat, rlong};
return r;
}
Thus we moderate with idd = 180 a coord that is in a Radian space.
Things to do :
1°) fix idd to : double idd= PI;
2°) Move idd definition to IProjector interface : The coord space should belong
to the projector doing the job. Change the code from CTP to use that new
interface.
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