Status of UELN and steps on the way to EVRS 2007

摘要

Since 1998 a lot of new data has been integrated in UELN –especially more than 7000 points of Scandinavia. Additional dataare expected. So the publication of a new UELN solution isindicated. The datum of the UELN-95/98 solution was realizedby the geopotential number of one benchmark in the Netherlandsrepresenting the NAP level. The level of the new UELN datumshould be defined by the geopotential values of the UELN-95/98solution of several points in Europe. Choosing points in countrieswith the same measurements as 1998 we will get a minimum ofheight changes in the network.