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From "Ignacio Vera (JIRA)" <j...@apache.org>
Subject [jira] [Created] (LUCENE-8126) Spatial prefix tree based on S2 geometry
Date Tue, 09 Jan 2018 13:48:00 GMT
Ignacio Vera created LUCENE-8126:
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             Summary: Spatial prefix tree based on S2 geometry
                 Key: LUCENE-8126
                 URL: https://issues.apache.org/jira/browse/LUCENE-8126
             Project: Lucene - Core
          Issue Type: New Feature
          Components: modules/spatial-extras
            Reporter: Ignacio Vera


Hi [~dsmiley],

I have been working on a prefix tree based on goggle S2 geometry (https://s2geometry.io/)
to be used mainly with Geo3d shapes with very promising results, in particular for complex
shapes (e.g polygons). Using this pixelization scheme reduces the size of the index, improves
the performance of the queries and reduces the loading time for non-point shapes. 

If you are ok with this contribution and before providing any code I would like to understand
what is the correct/prefered approach:

1) Add new depency to the S2 library (https://mvnrepository.com/artifact/io.sgr/s2-geometry-library-java).
It has Apache 2.0 license so it should be ok.

2) Create a utility class with all methods necessary to navigate the S2 tree and create shapes
from S2 cells (basically port what we need from the library into Lucene).

What do you think?





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