On Oct 20, 2010, at 12:14 PM, Pradeep Singh wrote: > Thanks for your response Grant. > > I already have the bounding box based implementation in place. And on a > document base of around 350K it is super fast. > > What about a document base of millions of documents? While a tier based > approach will narrow down the document space significantly this concern > might be misplaced because there are other numeric range queries I am going > to run anyway which don't have anything to do with spatial query. But the > keyword here is numeric range query based on NumericField, which is going to > be significantly faster than regular number based queries. I see that the > dynamic field type _latLon is of type double and not tdouble by default. Can > I have your input about that decision?
It's just an example. There shouldn't be any problem with using tdouble (or tfloat if you don't need the precision) > > -Pradeep > > On Tue, Oct 19, 2010 at 6:10 PM, Grant Ingersoll <gsing...@apache.org>wrote: > >> >> On Oct 19, 2010, at 6:23 PM, Pradeep Singh wrote: >> >>> https://issues.apache.org/jira/browse/LUCENE-2519 >>> >>> If I change my code as per 2519 >>> >>> to have this - >>> >>> public double[] coords(double latitude, double longitude) { >>> double rlat = Math.toRadians(latitude); >>> double rlong = Math.toRadians(longitude); >>> double nlat = rlong * Math.cos(rlat); >>> return new double[]{nlat, rlong}; >>> >>> } >>> >>> >>> return this - >>> >>> x = (gamma - gamma[0]) cos(phi) >>> y = phi >>> >>> would it make it give correct results? Correct projections, tier ids? >> >> I'm not sure. I have a lot of doubt around that code. After making that >> correction, I spent several days trying to get the tests to pass and >> ultimately gave up. Does that mean it is wrong? I don't know. I just >> don't have enough confidence to recommend it given that the tests I were >> asking it to do I could verify through other tools. Personally, I would >> recommend seeing if one of the non-tier based approaches suffices for your >> situation and use that. >> >> -Grant -------------------------- Grant Ingersoll http://www.lucidimagination.com/ Search the Lucene ecosystem docs using Solr/Lucene: http://www.lucidimagination.com/search
