A cadastre (also spelled cadaster), using a cadastral survey or cadastral map, is a comprehensive register of the metes-and-bounds real property of a country. A cadastre commonly includes details of the ownership, the tenure, the precise location (some include GPS coordinates), the dimensions (and area), the cultivations if rural, and the value of individual parcels of land. Cadastres are used by many nations around the world, some in conjunction with other records, such as a title register.

In most countries, legal systems have developed around the original administrative systems and use the cadastre to define the dimensions and location of land parcels described in legal documentation. The cadastre is a fundamental source of data in disputes and lawsuits between landowners.

In the United States, Cadastral Survey within the Bureau of Land Management maintains records of all public lands. Such surveys often require detailed investigation of the history of land use, legal accounts, and other documents.