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.
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