[Xapian-discuss] Geolocation

[Olly Betts]

On Fri, Oct 17, 2008 at 11:23:49AM +0200, Andreas Marienborg wrote:
> Add the following values to a document
>      # - (lat + 90) * 1_000_000 (to aleviate float problems)
>      # - (lon + 180) * 1_000_000 (to aleviate float problems)

Incidentally, there's no need to work in integers here - just use
Xapian::sortable_serialise() which compactly encodes floating point
numbers as strings which sort in the same order as the floating point
numbers do.  It's designed for such purposes.

Cheers,
    Olly