How to get distance in Solr 4 geospatial search?

Question

I'm playing with the new Solr 4 geospatial search. Like in an example from http://wiki.apache.org/solr/SolrAdaptersForLuceneSpatial4 I'm trying to get the results like so:

http://localhost:8983/solr/allopenhours/select?  
&q=foobar  
&fq=geo:%22Intersects(Circle(54.729696,-98.525391%20d=0.08992))%22  
&q={!%20score=distance}  
&fl=*,score 

But it doesn't work. How can I get distance and score fields in the results set?

Answer 1

According to the reference Spatial Search - Returning the distance you can edit your fields parameter to do one of the following:

• &fl=*,score,geodist()
• &fl=*,score,_dist_:geodist() - this one will return the distance in the alias _dist_

Answer 2

The answer Paige gave is correct. However, the error is shown depending on query given.

Error parsing fieldname: geodist - not enough parameters:[]

geodist needs the sfield (field which holds the location in the document) and a pt (the central point of the circle). If it can't find any of these, it will throw the error shown.

Either add these two to the URL

&pt=52.373,4.899&sfield=store&fl=_dist_:geodist()

Or add the two (or actually 3: pt, lat and lon) to the geodist() function call:

&fl:_dist_:geodist(store,52.373,4.899)

Note that in the first case, if you have additional geo functions (like geofilt) in your query, the pt and sfield are used for that as well (unless locally overridden)