[LUCENE-1930] Scale moderator not in line with sinusoidal projector

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 2.9, 2.9.1, 3.0
• Fix Version/s: 4.0-BETA
• Component/s: modules/spatial
• Lucene Fields: Patch Available
• Assignee: Chris Male
• Reporter: Nicolas Helleringer
• Created: 28/Sep/09 09:33
• Updated: 28/Aug/22 12:09
• Resolved: 02/Dec/13 03:08

Description

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.

Issue Links

• relates to: LUCENE-2139 Cleanup and Improvement of Spatial Contrib