private static void parseBoundingBox(String bb, Location target) {
        BoundingBoxParser parser = new BoundingBoxParser(bb);
        target.setBoundingBox(parser.n, parser.s, parser.e, parser.w);
    }
A searcher converting human-readable position parameters
into internal format.
<br>
Reads the following query properties:
<ul>
 <li> pos.ll (geographical latitude and longitude)
 <li> pos.xy (alternate to pos.ll - direct x and y in internal units)
 <li> pos.radius (distance in one of:
       internal units (no suffix), meter (m), kilometer (km) or miles (mi)
</ul>

@author arnej27959
container-search/src/main/java/com/yahoo/prelude/searcher/PosSearcher.java