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From mitu2009 <musicfrea...@gmail.com>
Subject RE: Correctly indexing latitude and longitude values in Lucene
Date Sun, 28 Jun 2009 18:28:44 GMT

Thanks Uwe...but I have not mentioned the padding logic in my earlier
mail.Just wanted to know if that logic would work.

Uwe Schindler wrote:
> 
> I already responded to your eMail and answered all your questions!
> 
> -----
> Uwe Schindler
> H.-H.-Meier-Allee 63, D-28213 Bremen
> http://www.thetaphi.de
> eMail: uwe@thetaphi.de
> 
>> -----Original Message-----
>> From: mitu2009 [mailto:musicfreaque@gmail.com]
>> Sent: Sunday, June 28, 2009 7:39 PM
>> To: java-user@lucene.apache.org
>> Subject: Correctly indexing latitude and longitude values in Lucene
>> 
>> 
>> Hi,
>> 
>> Am working on a  "US based nearest city search within a given radius"
>> functionality using Lucene API.
>> Am indexing city's lat and long values in Lucene as follows:
>> 
>>     doc.Add(new Field("latitude", paddedLatitude, Field.Store.YES,
>> Field.Index.UN_TOKENIZED));
>> 
>>     doc.Add(new Field("longitude", paddedLongitude, Field.Store.YES,
>> Field.Index.UN_TOKENIZED));
>> 
>> Since Lucene only understands strings and not numbers, am padding lat and
>> long values.
>> 
>> For example, if original lat and long are 41.811846 and -87.820628
>> respectively, after padding,values look like:
>> 
>> paddedLatitude -->"0041.811846" and paddedLongitude-->"-087.820628"
>> 
>> Am doing the same padding while building the nearest city query(using
>> Lucene's ConstantScoreRangeQuery class).
>> 
>> Given the fact that lat and long values could be decimal/negative
>> numbers,
>> is this the right approach to index them so that I would get correct
>> nearest
>> cities in the search results when lucene would perform a number
>> Range/comparison operation on these values?
>> 
>> Thanks.
>> 
>> --
>> View this message in context: http://www.nabble.com/Correctly-indexing-
>> latitude-and-longitude-values-in-Lucene-tp24243647p24243647.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>> 
>> 
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> 
> 
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> 

-- 
View this message in context: http://www.nabble.com/Correctly-indexing-latitude-and-longitude-values-in-Lucene-tp24243647p24244088.html
Sent from the Lucene - Java Users mailing list archive at Nabble.com.


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