Local and sub-national governments are often considered among the major users of geographic information in governments, as they often are involved in many different policy areas, in which many problems with a locational component need to be tackled. Geographic data produced and maintained by authorities at lower administrative levels are often more detailed and thus interesting for other users, both within and outside the public sector. As a result, local and sub-national governments are often involved in the establishment of these infrastructures because of the wide range of highly detailed geographic information they produce and manage. As many geographic data are linked to the activities and services of local organizations, the involvement of these organizations in the maintenance of data ensures that these data are up-to-date.