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Michael McCandless updated LUCENE-6699: --------------------------------------- Attachment: LUCENE-6699.patch Initial dirty patch, but its testBasic and testRandom seem to be passing! I just made a 3D version of BKD, and the random test tests across the full cube of +/- 1.022. I did a naive double -> int encoding for each dimension, storing in 12 byte binary DV per doc. Multi-valued docs aren't supported yet but I think it shouldn't be too hard. There are tons of nocommits because I don't know how to tie into the geo3d APIs... I think we should make a branch here, commit the two patches, and then iterate? > Integrate lat/lon BKD and spatial3d > ----------------------------------- > > Key: LUCENE-6699 > URL: https://issues.apache.org/jira/browse/LUCENE-6699 > Project: Lucene - Core > Issue Type: New Feature > Reporter: Michael McCandless > Assignee: Michael McCandless > Attachments: Geo3DPacking.java, LUCENE-6699.patch, LUCENE-6699.patch, > LUCENE-6699.patch > > > I'm opening this for discussion, because I'm not yet sure how to do > this integration, because of my ignorance about spatial in general and > spatial3d in particular :) > Our BKD tree impl is very fast at doing lat/lon shape intersection > (bbox, polygon, soon distance: LUCENE-6698) against previously indexed > points. > I think to integrate with spatial3d, we would first need to record > lat/lon/z into doc values. Somewhere I saw discussion about how we > could stuff all 3 into a single long value with acceptable precision > loss? Or, we could use BinaryDocValues? We need all 3 dims available > to do the fast per-hit query time filtering. > But, second: what do we index into the BKD tree? Can we "just" index > earth surface lat/lon, and then at query time is spatial3d able to > give me an enclosing "surface lat/lon" bbox for a 3d shape? Or > ... must we index all 3 dimensions into the BKD tree (seems like this > could be somewhat wasteful)? -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org