[Proj] Datum shifts in PROJ's EPSG table (The Netherlands and Belgium)

Oscar van Vlijmen ovv at hetnet.nl
Fri Oct 27 07:30:01 EDT 2006

> From: Jan Hartmann
> Date: Fri, 27 Oct 2006 11:24:40 +0200
> Subject: [Proj] Datum shifts in PROJ's EPSG table (The Netherlands and
> Belgium)
> Hi Oscar,
> The Datum shifts were derived from the EPSG database, version 6.11, nr
> 55; rotations are converted from radians to arc-seconds and
> sign-reversed. This transformation supersedes nr 53, which is the one
> you use and the one mentioned in the publications on the RDNAP website.
> The EPSG database mentions as source for 55: "Nederlandse Commissie
> voor Geodesie (NCG)". This seems to be:
> A. de Bruijne, J. van Buren, A. Kösters and H. van der Marel, "De
> geodetische referentiestelsels van Nederland; Definitie en vastlegging
> van ETRS89, RD en NAP en hun onderlinge relatie". Delft: Nederlandse
> Commissie voor Geodesie (NCG), to be published in 2005

Thanks for taking the time to shed some light on the matter of
transformation parameters for NL & BE.
I've already seen the publication from De Bruijne et alii.
One can buy a hardcopy or download a free PDF. It's a bilingual publication:
Dutch & English.
English title: "Geodetic reference frames in the Netherlands, Definition and
specification of ETRS89, RD and NAP, and their mutual relationships."
The new RD2004 is mentioned, but no actual transformation parameters are
Currently the best freely available internet source for the problem at hand
seems to be the EPSG database.

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