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/>
