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Apr 1, 2010, 6:18 AM
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[jira] Resolved: (LUCENE-2359) CartesianPolyFilterBuilder doesn't handle edge case around the 180 meridian
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[ https://issues.apache.org/jira/browse/LUCENE-2359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Grant Ingersoll resolved LUCENE-2359.
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Resolution: Fixed
Committed revision 929956.
> CartesianPolyFilterBuilder doesn't handle edge case around the 180 meridian
> ---------------------------------------------------------------------------
>
> Key: LUCENE-2359
> URL: https://issues.apache.org/jira/browse/LUCENE-2359
> Project: Lucene - Java
> Issue Type: Bug
> Components: contrib/spatial
> Affects Versions: 2.9, 2.9.1, 2.9.2, 3.0, 3.0.1
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Attachments: LUCENE-2359.patch
>
>
> Test case:
> Points all around the globe, plus two points at 0, 179.9 and 0,-179.9 (on each side of the meridian). Then, do a Cartesian Tier filter on a point right near those two. It will return all the points when it should just return those two.
> The flawed logic is in the else clause below:
> {code}
> if (longX2 != 0.0) {
> //We are around the prime meridian
> if (longX == 0.0) {
> longX = longX2;
> longY = 0.0;
> shape = getShapeLoop(shape,ctp,latX,longX,latY,longY);
> } else {//we are around the 180th longitude
> longX = longX2;
> longY = -180.0;
> shape = getShapeLoop(shape,ctp,latY,longY,latX,longX);
> }
> {code}
> Basically, the Y and X values are transposed. This currently says go from longY (-180) all the way around to longX which is the lower left longitude of the box formed. Instead, it should go from the lower left long to -180.
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