Ignacio Vera created LUCENE-7970:
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Summary: Improve generation of circle plane
Key: LUCENE-7970
URL: https://issues.apache.org/jira/browse/LUCENE-7970
Project: Lucene - Core
Issue Type: Improvement
Components: modules/spatial3d
Reporter: Ignacio Vera
Hi [~Karl wright],
How circles are currently build do not behave very well when the planet model
is not an sphere. when you are close to the border in WGS84 you might get false
positves or false negatives when checking if a point is WITHIN. I think the
reason is how the points to generate the circle plane are generated which
assumes a sphere.
My proposal is the following:
Add a new method to PlanetModel:
public GeoPoint pointOnBearing(GeoPoint from, double dist, double bearing);
Which uses and algorithm that takes into account that the planet might not be
spherical. For example Vincenty's formulae
(https://en.wikipedia.org/wiki/Vincenty%27s_formulae).
Use this method to generate the points for the circle plane. My experiments
shows that this approach removes false negatives in WGS84 meanwhile it works
nicely in the Sphere.
Does it make sense?
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