Apache Solr Reference Guide Covering Apache Solr 6.0

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The bbox filter is very similar to geofilt except it uses the bounding box of the calculated circle. See the blue
box in the diagram below. It takes the same parameters as geofilt. Here's a sample query: &q=*:*&fq={!bbox
sfield=store}&pt=45.15,-93.85&d=5. The rectangular shape is faster to compute and so it's sometimes
used as an alternative to geofilt when it's acceptable to return points outside of the radius. However, if the ideal
goal is a circle but you want it to run faster, then instead consider using the RPT field and try a large "distErrPct"
value like 0.1 (10% radius). This will return results outside the radius but it will do so somewhat uniformly around
the shape.
When a bounding box includes a pole, the bounding box ends up being a "bounding bowl" (a spherical
cap) that includes all values north of the lowest latitude of the circle if it touches the north pole (or south
of the highest latitude if it touches the south pole).
Filtering by an arbitrary rectangle
Sometimes the spatial search requirement calls for finding everything in a rectangular area, such as the area
covered by a map the user is looking at. For this case, geofilt and bbox won't cut it. This is somewhat of a trick,
but you can use Solr's range query syntax for this by supplying the lower-left corner as the start of the range and
the upper-right corner as the end of the range. Here's an example: &q=*:*&fq=store:[45,-94 TO 46,-9
3] . LatLonType does not support rectangles that cross the dateline, but RPT does. If you are using RPT with
non-geospatial coordinates ( geo="false" ) then you must quote the points due to the space, e.g. "x y" .
Optimization: Solr Post Filtering
Most likely, the fastest spatial filters will be to simply use the RPT field type. However, sometimes it may be
faster to use LatLonType with Solr post filtering in circumstances when both the spatial query isn't worth caching
and there aren't many matching documents that match the non-spatial filters (e.g. keyword queries and other
filters). To use Solr post filtering with LatLonType, use the bbox or geofilt query parsers in a filter query but
specify cache=false and cost=100 (or greater) as local-params. Here's a short example:
&q=...mykeywords...&fq=...someotherfilters...&fq={!geofilt cache=false
cost=100}&sfield=store&pt=45.15,-93.85&d=5
Distance Function Queries
There are four distance function queries: geodist, see below, usually the most appropriate; dist, to calculate
the p-norm distance between multi-dimensional vectors; hsin, to calculate the distance between two points on a
Apache Solr Reference Guide 6.0
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