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https://issues.apache.org/jira/browse/LUCENE-6450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14510761#comment-14510761
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Uwe Schindler commented on LUCENE-6450:
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bq. mm: another question about overriding the accept() method for
NumericRangeTermsEnum: it looks like you extract the full precision lat/lon
from the incoming term, yet this term could be a shifted term right (lost some
of its lower bits)?
I think I figured out: the Geo queries always use precStep=64, so shifted terms
will never appear. I just have the question (why do this?). The whole sense of
NumericRangeQuery is to use the lower-precision terms to not visit too many
terms... Could you, Nicholas, please explain, why we dont want to use the
prefix terms? I agree it makes it more complicated, but I think the current
encoding could use it. And the terms are not "wasteful"! :-)
> Add simple encoded GeoPointField type to core
> ---------------------------------------------
>
> Key: LUCENE-6450
> URL: https://issues.apache.org/jira/browse/LUCENE-6450
> Project: Lucene - Core
> Issue Type: New Feature
> Affects Versions: 5.x
> Reporter: Nicholas Knize
> Priority: Minor
> Attachments: LUCENE-6450.patch
>
>
> At the moment all spatial capabilities, including basic point based indexing
> and querying, require the lucene-spatial module. The spatial module, designed
> to handle all things geo, requires dependency overhead (s4j, jts) to provide
> spatial rigor for even the most simplistic spatial search use-cases (e.g.,
> lat/lon bounding box, point in poly, distance search). This feature trims the
> overhead by adding a new GeoPointField type to core along with
> GeoBoundingBoxQuery, GeoPolygonQuery, and GeoDistanceQuery classes to the
> .search package. This field is intended as a straightforward lightweight type
> for the most basic geo point use-cases without the overhead.
> The field uses simple bit twiddling operations (currently morton hashing) to
> encode lat/lon into a single long term. The queries leverage simple
> multi-phase filtering that starts by leveraging NumericRangeQuery to reduce
> candidate terms deferring the more expensive mathematics to the smaller
> candidate sets.
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