[LUCENE-8577] Improve accuracy of distance query for Geo3DPoint

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: modules/spatial3d
• Lucene Fields: New
• Assignee: Unassigned
• Reporter: Ignacio Vera
• Created: 28/Nov/18 09:36
• Updated: 28/Aug/22 15:38

Description

The distance query for Geo3DPoint currently uses the GeoStandardCircle which is only accurate when the PlanetModel is a sphere.

In LUCENE-7970. a new implementation called GeoExactCircle was added that models an exact circle, even when the planet model is not a sphere. Because Geo3DPoint is using WGS84 planet model, we should be using this implementation instead. The downside is that this implementation will be slightly slower.