David Smiley created SOLR-6183:
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Summary: Add spatial BBoxField using BBoxSpatialStrategy
Key: SOLR-6183
URL: https://issues.apache.org/jira/browse/SOLR-6183
Project: Solr
Issue Type: New Feature
Components: spatial
Reporter: David Smiley
Assignee: David Smiley
Fix For: 4.10
This introduces a new BBoxField configured like so:
{code:xml}
<fieldType name="bbox" class="solr.BBoxField"
numberType="tdouble" units="degrees"/>
{code}
It's a field type based on the same backing as the other Solr 4 spatial field
types (namely RPT) and thus it inherits the same way to use it, plus what is
unique to this field. Ideally, the numberType would point to double based
field type configured with docValues=true but that is not required. Only
TrieDouble no float yet.
This strategy only accepts indexed rectangles and querying by a rectangle.
Indexing a rectangle requires WKT:
{{ENVELOPE(-10, 20, 15, 10)}} which is minX, maxX, maxY, minY (yeah, that 'y'
order is wacky but it's not my spec). This year I hope to add indexing
{{\['lat,lon' TO 'lat,lon']}} but it's not in there yet.
To query using it's special area overlap ranking, you have to use the special
'score' local-param with a new value like so:
{{q=\{!field f=bbox score=areaOverlap
queryTargetProportion=0.25}Intersects(ENVELOPE(10,25,12,10))}}
The queryTargetProportion defaults to 0.25 to be roughly what GeoPortal uses
(although GeoPortal actually has a different formula). This default weights 1
part query factor to 3 parts target factor.
Add debug=results to see useful "explain" info.
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