You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Nicolas Helleringer (JIRA)" <ji...@apache.org> on 2010/07/01 08:50:50 UTC
[jira] Commented: (LUCENE-1930) Scale moderator not in line with
sinusoidal projector
[ https://issues.apache.org/jira/browse/LUCENE-1930?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884189#action_12884189 ]
Nicolas Helleringer commented on LUCENE-1930:
---------------------------------------------
Hi Grant,
You are right : it has nothing to do here.
Regards,
Nicolas
2010/6/29 Grant Ingersoll (JIRA) <ji...@apache.org>
> Scale moderator not in line with sinusoidal projector
> -----------------------------------------------------
>
> 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, 2.9.1, 3.0
> Reporter: Nicolas Helleringer
> Assignee: Chris Male
> Attachments: LUCENE-1930.patch
>
>
> 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.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org