The metropolis of Sydney in New South Wales, Australia, is informally subdivided into a number of geographic regions. These areas sometimes, but not always, roughly coincide with official boundaries of suburbs, local government authorities, or cadastral units (used for land title purposes), and some of the customary regions do not have well defined boundaries at all. Some commonly referred to regions overlap: for example, "Canterbury-Bankstown" is often referred to as a region, but it is also part of the "South Western Sydney" region. The regions themselves are not used as a formal jurisdiction, and do not have administrative or legislative bodies.