String tierPrefix = key + "`tier_";
jlog.finer("lat:" + lat + ", lng:" + lng + ", miles:" + miles
+ ", prefix: " + tierPrefix);
CartesianPolyFilterBuilder cpf = new CartesianPolyFilterBuilder(
tierPrefix, DocumentTranslator.MIN_TIER,
DocumentTranslator.MAX_TIER);
Filter cartesianFilter = cpf.getBoundingArea(lat, lng, miles);
DistanceFilter filter = new LatLongDistanceFilter(
cartesianFilter, lat, lng, miles, key + "`lat", key
+ "`lng");
ValueSource valSrc = new DistanceValueSource(filter);