+1  Interested to take a look.  Out on paternity leave so it will be a few days 
but I'll check it against some validity tests I often use when I return.  
Exciting advancements

// sent from my mobile device, please excuse the brevity and typos

> On May 20, 2015, at 12:45 PM, Karl Wright (JIRA) <[email protected]> wrote:
> 
> 
>     [ 
> https://issues.apache.org/jira/browse/LUCENE-6487?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
>  ]
> 
> Karl Wright updated LUCENE-6487:
> --------------------------------
>    Attachment: LUCENE-6487.patch
> 
> Ok, all done.
> 
> 
>> Add WGS84 capability to geo3d support
>> -------------------------------------
>> 
>>                Key: LUCENE-6487
>>                URL: https://issues.apache.org/jira/browse/LUCENE-6487
>>            Project: Lucene - Core
>>         Issue Type: Improvement
>>         Components: modules/spatial
>>           Reporter: Karl Wright
>>        Attachments: LUCENE-6487.patch, LUCENE-6487.patch, LUCENE-6487.patch
>> 
>> 
>> WGS84 compatibility has been requested for geo3d.  This involves working 
>> with an ellipsoid rather than a unit sphere.  The general formula for an 
>> ellipsoid is:
>> x^2/a^2 + y^2/b^2 + z^2/c^2 = 1
> 
> 
> 
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