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ASF subversion and git services commented on LUCENE-7970: --------------------------------------------------------- Commit d84beb415cebc3f144fdd068c2728d5468d8c343 in lucene-solr's branch refs/heads/master from [~kwri...@metacarta.com] [ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=d84beb4 ] LUCENE-7970: Add surface point on bearing method to PlanetModel. Committed on behalf of Ignacio Vera. > 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 > Assignee: Karl Wright > Attachments: LUCENE_7970.patch, LUCENE-7970.patch, > LUCENE-7970-proposed.patch > > > 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? -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org