What a fun use case for dimensional points! I just saw NASA announce this data set recently: https://plus.google.com/+MichaelMcCandless/posts/ h8eUtkhizKG
And I was wondering how to play with it... 36 TB of airplane flight routes :) You can easily index your data (3 spatial dims + 1 time dim) using e.g. DoublePoint but then the only way to query those points currently is the PointRangeQuery (4D boxes); maybe you can use that to find the "interesting area" traversals? For "minimum distance between two air-planes", you might be able to start with LatLonPoint.nearest (KNN search implementation) but generalize it a bit to N dims not just the 2 (lat, lon) that it supports today? Mike McCandless http://blog.mikemccandless.com On Tue, Aug 16, 2016 at 4:29 AM, Janaka Thilakarathna < bjchathura...@gmail.com> wrote: > Hi everyone, > > I am from University of Moratuwa. I have a quite understanding in Lucene's > Text Search, Geo3DPoint > <https://lucene.apache.org/core/6_0_0/spatial3d/org/apache/ > lucene/spatial3d/Geo3DPoint.html#newShapeQuery-java.lang. > String-org.apache.lucene.spatial3d.geom.GeoShape->, > LatLonPoint > <https://lucene.apache.org/core/6_0_0/sandbox/org/apache/luc > ene/document/LatLonPoint.html#newPolygonQuery-java.lang. > String-double:A-double:A-> > but I have never used Lucene for multi dimentional space search. > > The idea is to use multi dimensional space search on 4 dimensional space(3 > physical dimensions and time as another dimension) to calculate results for > following queries. > > - minimum distance between two air-planes > - whether air planes goes through and interesting area. (For a example: > A forbidden air space) > > Paths of air-planes can be represented by arrays of 4D points. > (time,x,y,z). In other words I have different x,y,z coordinates for > different time values. My idea is to index these points and query for above > results. > > Since there is no much tutorials on this new feature on Lucene 6, I am > quite confused where to start the project. I am really glad if someone can > help me with this. > > I just want to know whether I can use Lucene for this use-case. Further if > you can point me out a place to start developing, it will be really help > full. > > Thank you! > > Regards > > -- > *Janaka Chathuranga Thilakarathna* > Undergraduate at Computer Science and Engineering Department, > UNIVERSITY OF Moratuwa, Sri Lanka*.* > > mobile :(+94)* 713315725 **| *email : *janaka...@cse.mrt.ac.lk* > <janaka...@cse.mrt.ac.lk>*, bjchathura...@gmail.com > <bjchathura...@gmail.com>* > skype : *janaka.chathurangat* | website : janakact.wordpress.com > > my public profiles : [image: Facebook] > <http://www.facebook.com/bjchathuranga> [image: LinkedIn] > <http://lk.linkedin.com/pub/janaka-chathuranga-thilakarathna/78/2a8/807/> >
