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https://issues.apache.org/jira/browse/LUCENE-6487?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14564851#comment-14564851
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David Smiley commented on LUCENE-6487:
--------------------------------------
I rewrote the test; and indirectly test the arcDistance somewhat since it calls
that. Can you try this? It seems my error epsilons are too tiny. Or maybe
you see something the matter.
{code:java}
@Test
public void testConversion() {
testPointRoundTrip(PlanetModel.SPHERE, 90, 0, 1e-12);
testPointRoundTrip(PlanetModel.SPHERE, -90, 0, 1e-12);
testPointRoundTrip(PlanetModel.WGS84, 90, 0, 1e-12);
testPointRoundTrip(PlanetModel.WGS84, -90, 0, 1e-12);
final double pLat = (randomFloat() * 180.0 - 90.0) *
DistanceUtils.DEGREES_TO_RADIANS;
final double pLon = (randomFloat() * 360.0 - 180.0) *
DistanceUtils.DEGREES_TO_RADIANS;
testPointRoundTrip(PlanetModel.SPHERE, pLat, pLon, 1e-12);
testPointRoundTrip(PlanetModel.WGS84, pLat, pLon, 1e-6);//bigger error
tolerance
}
protected void testPointRoundTrip(PlanetModel planetModel, double pLat,
double pLon, double epsilon) {
final GeoPoint p1 = new GeoPoint(planetModel, pLat, pLon);
final GeoPoint p2 = new GeoPoint(planetModel, p1.getLatitude(),
p1.getLongitude());
double dist = p1.arcDistance(p2);
assertEquals(0, dist, epsilon);
}
{code}
> Add WGS84 capability to geo3d support
> -------------------------------------
>
> Key: LUCENE-6487
> URL: https://issues.apache.org/jira/browse/LUCENE-6487
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/spatial
> Reporter: Karl Wright
> Attachments: LUCENE-6487.patch, LUCENE-6487.patch, LUCENE-6487.patch,
> LUCENE-6487.patch
>
>
> WGS84 compatibility has been requested for geo3d. This involves working with
> an ellipsoid rather than a unit sphere. The general formula for an ellipsoid
> is:
> x^2/a^2 + y^2/b^2 + z^2/c^2 = 1
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