@book{JRC30725, editor = {}, address = {}, year = {2005}, author = {Kay S}, isbn = {}, abstract = {The use of geospatial data in European Union policy programs has been on a strongly upward trend since the removal of selective availability from GPS in 2000. Many areas and services are set to benefit from improved GNSS performance, among which agriculture, land administration and statistical survey are important ¿ but less frequently cited ¿ policy domains. For example, each year over one million agricultural field areas are checked against farmers¿ claims to ensure that farmers receive the right amount of subsidies. This action, stemming from EU Common Agricultural Policy reform in the early 1990s and aimed at preventing fraudulent use of taxpayers' money, is now heavily supported by GPS, in addition to the long existing use of remote sensing data. Land administration programs ¿ a number of which are assisted by EU regional development funds ¿ which already incorporate GPS as a core survey tool, will benefit further from improved services provided by EGNOS and Galileo; for example, the mapping of citizens¿ cadastral plots can be facilitated by cheaper, faster and more reliable techniques. The feasibility of using GNSS services for high accuracy area estimates, and the parallel use for maintaining geo-spatial data infrastructures such as IACS and cadastral mapping, has been examined theoretically and statistically in studies managed by the JRC. This paper will introduce the approaches and results of these studies and help define requirements and priorities for geo-data survey using GNSS in these domains. }, title = {GNSS assisted survey and mapping in EU geospatial data structures}, url = {}, volume = {}, number = {}, journal = {}, pages = {}, issn = {}, publisher = {}, doi