def getEPSGStringForUTMZone(zone, isNorth):
    """ Get EPSG string, e.g. "EPSG:32618" for UTM zone (WGS84)
    
        @param zone Integer representing UTM zone
        @param isNorth True if north
        
        @return String of the pattern "^EPSG:\d+$"
    """
    if isNorth:
        epsg = 32600 + zone
    else:
        epsg = 32700 + zone
    return "EPSG:%d" % (epsg,)