RE: Sort by distance from location?
I've never used them personally, but I think a function query would suit you here. Function queries allow you to define a custom function as a component of the score of a result document. Define a distance function based on the user's current location and the that of the search result, such that the shorter the distance, the higher the function output. This will boost results inversely proportional to the distance from the user. -Ken -Original Message- From: Development Team [mailto:dev.and...@gmail.com] Sent: Tuesday, April 14, 2009 5:32 PM To: solr-user@lucene.apache.org Subject: Sort by distance from location? Hi everybody, My index has latitude/longitude values for locations. I am required to do a search based on a set of criteria, and order the results based on how far the lat/long location is to the current user's location. Currently we are emulating such a search by adding criteria of ever-widening bounding boxes, and the more of those boxes match the document, the higher the score and thus the closer ones appear at the start of the results. The query looks something like this (newlines between each search term): +criteraOne:1 +criteriaTwo:true +latitude:[-90.0 TO 90.0] +longitude:[-180.0 TO 180.0] (latitude:[40.52 TO 40.81] longitude:[-74.17 TO -73.79]) (latitude:[40.30 TO 41.02] longitude:[-74.45 TO -73.51]) (latitude:[39.94 TO 41.38] longitude:[-74.93 TO -73.03]) [[...etc...about 10 times...]] Naturally this is quite slow (query is approximately 6x slower than normal), and... I can't help but feel that there's a more elegant way of sorting by distance. Does anybody know how to do this or have any suggestions? Sincerely, Daryl.
Sort by distance from location?
Hi everybody, My index has latitude/longitude values for locations. I am required to do a search based on a set of criteria, and order the results based on how far the lat/long location is to the current user's location. Currently we are emulating such a search by adding criteria of ever-widening bounding boxes, and the more of those boxes match the document, the higher the score and thus the closer ones appear at the start of the results. The query looks something like this (newlines between each search term): +criteraOne:1 +criteriaTwo:true +latitude:[-90.0 TO 90.0] +longitude:[-180.0 TO 180.0] (latitude:[40.52 TO 40.81] longitude:[-74.17 TO -73.79]) (latitude:[40.30 TO 41.02] longitude:[-74.45 TO -73.51]) (latitude:[39.94 TO 41.38] longitude:[-74.93 TO -73.03]) [[...etc...about 10 times...]] Naturally this is quite slow (query is approximately 6x slower than normal), and... I can't help but feel that there's a more elegant way of sorting by distance. Does anybody know how to do this or have any suggestions? Sincerely, Daryl.
Re: Sort by distance from location?
Have you tried LocalSolr? http://www.gissearch.com/localsolr (I haven't but looks cool) On 4/14/09 5:31 PM, Development Team dev.and...@gmail.com wrote: Hi everybody, My index has latitude/longitude values for locations. I am required to do a search based on a set of criteria, and order the results based on how far the lat/long location is to the current user's location. Currently we are emulating such a search by adding criteria of ever-widening bounding boxes, and the more of those boxes match the document, the higher the score and thus the closer ones appear at the start of the results. The query looks something like this (newlines between each search term): +criteraOne:1 +criteriaTwo:true +latitude:[-90.0 TO 90.0] +longitude:[-180.0 TO 180.0] (latitude:[40.52 TO 40.81] longitude:[-74.17 TO -73.79]) (latitude:[40.30 TO 41.02] longitude:[-74.45 TO -73.51]) (latitude:[39.94 TO 41.38] longitude:[-74.93 TO -73.03]) [[...etc...about 10 times...]] Naturally this is quite slow (query is approximately 6x slower than normal), and... I can't help but feel that there's a more elegant way of sorting by distance. Does anybody know how to do this or have any suggestions? Sincerely, Daryl.
Re: Sort by distance from location?
Ah, good question: Yes, we've tried it... and it was slower. To give some avg times: Regular non-distance Searches: 100ms Our expanding-criteria solution: 600ms LocalSolr: 800ms (We also had problems with LocalSolr in that the results didn't seem to be cached in Solr upon doing a search. So each page of results meant another 800ms.) - Daryl. On Tue, Apr 14, 2009 at 5:34 PM, Smiley, David W. dsmi...@mitre.org wrote: Have you tried LocalSolr? http://www.gissearch.com/localsolr (I haven’t but looks cool)
