The rapid recent developments in digital mapping technology and the increasing demand for geo-referenced small area population data have been the main motivation for the present handbook. The Handbook provides guidance on how to ensure consistency and facilitate census operations; support data collection and help monitor census activities during enumeration; and facilitate presentation, analysis and dissemination of census results. Along with an overview of geographic information systems and digital mapping, the publication discusses cost-benefit analysis of an investment in digital cartography and geographical information systems (GIS); the use of GIS during census enumeration; and describes the role of GIS and digital mapping in the post-censal phase [from UN website].Authorized combinations of attribute values For fixed domain attributes, all allowable combinations of attributes are listed. ... Relations are defined by the following characteristics: Entity name and geometry of entity - e.g., point (P), line ( L) or ... The intersection must have at least one road connected to it, and can, in theory, be connected to an infinite number of roads. ... However, especially if the census database is to be incorporated in a national GIS database, it is advisable to spendanbsp;...
|Title||:||Handbook on Geographic Information Systems and Digital Mapping|
|Author||:||United Nations. Statistical Division|
|Publisher||:||United Nations Publications - 2000|