Hi Michael, Got it. :) Thank you very much for the reply.
Janaka On Thu, Aug 25, 2016 at 9:22 PM, Michael McCandless < luc...@mikemccandless.com> wrote: > Geo3D uses more "straightforward" math since it can do everything on a > unit (well, slightly squashed) sphere, but the downside is it must store 3 > floats in the doc values. > > Whereas LatLonPoint must use Haversine, supposedly more costly, except > Lucene has a rather optimized implementation, and in practice seems to be > faster than the 3D math: see our nightly geo benchmarks at > http://home.apache.org/~mikemccand/geobench.html > > That said, having competing choices in open source is very healthy. E.g. > we have multiple highlighter implementations, multiple query parsers, etc. > > Mike McCandless > > http://blog.mikemccandless.com > > On Thu, Aug 25, 2016 at 12:09 AM, Janaka Thilakarathna < > bjchathura...@gmail.com> wrote: > >> Hi Michael, >> >> I am kinda confused about the difference between LatLon and Geo3D points. >> Since, Geo3D does not in fact search 3 dimensions, what is the use of it >> over LatLonPoint. Why there are two Fields as LatLon and Geo3D if both do >> the Planet Surface search ? >> >> Regards, >> Janaka >> >> On Mon, Aug 22, 2016 at 3:19 PM, Michael McCandless < >> luc...@mikemccandless.com> wrote: >> >>> Hi Janaka, >>> >>> Unfortunately, Geo3D does not in fact search three dimensions: it only >>> handles the same 2D earth surface as lat/lon. It's just that, internally, >>> it's using three x,y,z coordinates to do all its math. But those three >>> coordinates must be on the earth's surface for the math to be correct. We >>> have wanted to rename this package so it's not so confusing, but have not >>> yet succeeded. I believe the x,y,z are in the "unit sphere" coordinate >>> space. >>> >>> Mike McCandless >>> >>> http://blog.mikemccandless.com >>> >>> On Mon, Aug 22, 2016 at 2:13 AM, Janaka Thilakarathna < >>> bjchathura...@gmail.com> wrote: >>> >>>> Hi Michael, >>>> >>>> I started playing with Lucene LatLon and Geo3D points. I have a problem >>>> about the constructor of Geo3DPoint. >>>> >>>> In the other constructor, Geo3DPoint(String name, double x, double y, >>>> double z) >>>> <https://lucene.apache.org/core/6_1_0/spatial3d/org/apache/lucene/spatial3d/Geo3DPoint.html#Geo3DPoint-java.lang.String-double-double-double->. >>>> How can I map*,* Lat, Lon and Altitude into x,y,z. If we use x,y,z >>>> there should be an Axis system. For an example I have these questions, >>>> >>>> - Where those axises are pointed to? >>>> - What are the units (km or m)? >>>> >>>> If you can give me an idea on that it will be really helpful. :-) >>>> Thank you. >>>> >>>> Regards, >>>> >>>> Janaka. >>>> >>>> On Thu, Aug 18, 2016 at 9:55 AM, Janaka Thilakarathna < >>>> bjchathura...@gmail.com> wrote: >>>> >>>>> Hi Michael, >>>>> >>>>> Sorry for the late reply and thank you very much for your quick >>>>> respond. :-) >>>>> >>>>> Yeah, it looks like an interesting data set to play with, but it is >>>>> really large to start. :D >>>>> I will try some simple projects and get back to you if I find any >>>>> trouble. >>>>> >>>>> Janaka. >>>>> >>>>> On Tue, Aug 16, 2016 at 2:49 PM, Michael McCandless < >>>>> luc...@mikemccandless.com> wrote: >>>>> >>>>>> 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/l >>>>>>> ucene/spatial3d/Geo3DPoint.html#newShapeQuery-java.lang.Stri >>>>>>> ng-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.Stri >>>>>>> ng-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/> >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> *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/> >>>>> >>>> >>>> >>>> >>>> -- >>>> *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/> >>>> >>> >>> >> >> >> -- >> *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/> >> > > -- *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/>
