Solr查询计算两点之间的地理距离

Question

I have latitude and longitude of two business locations and want to calculate the distance between them. How do i do it using solr query.

I got the query to get all the nearest locations from a point ( latitude , longitude ).

But want a query to get distance between two points.

Below is the sample code snippet to get the locations from a point

// sample location

location = new double[]{lat, long}; 

SolrQuery query = new SolrQuery("{!func}geodist()");  
query.set("fq","query");  
query.set("sfield", "location");  
query.set("pt", location );  
query.setSortField("score", ORDER.asc);  
query.setFields("score", "id");  
SolrDocumentList list = solrServer.query(query).getResults();  

Answer 1

To return distance you should add geodist() function to fl field list query field like that:

query.set("fl","*,distance:geodist()")

"distance" is the field name to return geodist() result in.