public MicroCache getMicroCache(final int ilon, final int ilat) {
        final int lonIdx = ilon / cellsize;
        final int latIdx = ilat / cellsize;
        final int subIdx = (latIdx - divisor * latDegree) * divisor + (lonIdx - divisor * lonDegree);
        return microCaches[subIdx];
    }
cache for a single square

@author ab
main/src/main/java/cgeo/geocaching/brouter/mapaccess/OsmFile.java