David Smiley created SOLR-3864:
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             Summary: Spatial maxDetailDist doesn't follow degrees 
standardization
                 Key: SOLR-3864
                 URL: https://issues.apache.org/jira/browse/SOLR-3864
             Project: Solr
          Issue Type: Bug
          Components: Schema and Analysis
            Reporter: David Smiley
            Assignee: David Smiley


Technically this bug is in Lucene spatial but it's on a factory that is only 
really used by the Solr adapter, plus I added a mandatory attribute so I 
decided to file it here.

The maxDetailDist attribute on SpatialRecursivePrefixTreeFieldType is 
interpreted as kilometers for a geospatial context.  However, for this first 
release of spatial, all distances are standardized on degrees.  Of course I 
want to support kilometers but not inconsistently and there isn't time for that 
right now.  Because this is likely to be a common problem of interpreting 
distances for this field, I decided to add a mandatory attribute "units" which 
must be "degrees".  When kilometers is supported then it will be added.

Furthermore, the name "maxDetailDist" as a name isn't so great. As part of some 
renames related to this sort of thing a month back I overlooked this one.  I 
think "maxDistErr" is better and more consistent with attributes such as 
"distErr" you can put in shape query.

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