DFHRS - Nordrhein-Westphalen 2004 and 2006
The computation of the DFHRS databases for NN- and for nomal heights, respectively were done
in cooperation between Ingenieurbüro Seiler
(www.ib-seiler.de)
and IAF/HSKA.
The quality of DFRHS database Nordrhein-Westfalen is again 1cm. The fig. below shows the isolines
of the HRS N(B,L), computed with DFHRS-software version according to the
approach stage 1, formulas (2a-f).
Fig.: Isolines N(B,L) of the 1 cm DFHRS database Nordrhein-Westfalen
