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From "David Smiley (JIRA)" <>
Subject [jira] [Commented] (LUCENE-2646) Implement the Military Grid Reference System for tiling
Date Mon, 02 Dec 2013 04:17:37 GMT


David Smiley commented on LUCENE-2646:

I'm tempted to close this old issue as "won't fix" because there is already two working tiling
systems (geohash & quad). It would add complications of dealing with overlap that exists
between MGRS tiles, and needing additional projections for the poles.

The only benefit I can think of is that you might want to support shapes defined as existing
on this projection (technically "these projections" as each tile is its own projection). 
So a circle (point-radius), for example, isn't a true geodetic point-radius, it's a 2D point-radius
as projected on a particular MGRS tile.  Is there much value?  Shrug; I don't think so.  My
preference is to close this and only re-open when some user/app want this for some unique
value that such a tiling system would provide over existing ones we have.

> Implement the Military Grid Reference System for tiling
> -------------------------------------------------------
>                 Key: LUCENE-2646
>                 URL:
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: modules/spatial
>            Reporter: Grant Ingersoll
> The current tile based system in Lucene is broken.  We should standardize on a common
way of labeling grids and provide that as an option.  Based on previous conversations with
Ryan McKinley and Chris Male, it seems the Military Grid Reference System (
is a good candidate for the replacement due to its standard use of metric tiles of increasing
orders of magnitude (1, 10, 100, 1000, etc.)

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