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 data are expected. So the publication of a new UELN solution is indicated. The datum of the UELN-95/98 solution was realized by the geopotential number of one benchmark in the Netherlands representing the NAP level. The level of the new UELN datum should be defined by the geopotential values of the UELN-95/98 solution of several points in Europe. Choosing points in countries with the same measurements as 1998 we will get a minimum of height changes in the network.