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Commits on Source (3)
......@@ -25,7 +25,7 @@ Direct links to the relevant pages:
https://www.kadaster.nl/rdnaptrans2008-download-
- RDNAPTRANS2008.zip file
https://www.kadaster.nl/documents/20838/87996/RDNAPTRANS2008/93c6e723-9e85-4b9d-abcb-a569e447d564
http://gnss-data.kadaster.nl/root/misc/rdnaptrans2008/RDNAPTRANS2008.zip
For the 2018 update of the grids, more information (in dutch) is available
on the Nederlandse Samenwerking Geodetische Infrastructuur (NSGI) website:
......@@ -44,7 +44,7 @@ Direct links to the relevant pages:
https://formulieren.kadaster.nl/page/download-rdnaptrans
- RDNAPTRANS2018.zip file
https://kadaster.nl/documents/1888506/2496175/RDNAPTRANS.zip/827827a3-b88a-5d16-55b6-7f83010e1b2f?t=1565686584552
https://kadaster.nl/documents/1888506/2496175/RDNAPTRANS.zip/827827a3-b88a-5d16-55b6-7f83010e1b2f
The license contained in the RDNAPTRANS2008.zip file is problematic, because
it doesn't allow distribution. The license is documented in the file
......
proj-rdnap (2008+2018-1) UNRELEASED; urgency=medium
proj-rdnap (2008+2018-1) unstable; urgency=medium
* New upstream release.
* Bump Standards-Version to 4.4.1, no changes.
* Update README.Debian & get-orig-source script for 2018 grids.
* Also install 2018 grids and its documentation.
* Update copyright for 2018 grids and its documentation.
* Add tests for 2018 grids.
* Update package description for 2018 grids.
-- Bas Couwenberg <sebastic@debian.org> Wed, 02 Oct 2019 17:03:17 +0200
-- Bas Couwenberg <sebastic@debian.org> Thu, 17 Oct 2019 13:24:15 +0200
proj-rdnap (2008-9) unstable; urgency=medium
......
......@@ -56,3 +56,53 @@ Description: RDNAP grid correction files for PROJ
transformation will be correct, geographic Bessel-1841 coordinates will
differ in both procedures and should only be considered as an intermediate
result.
.
RDNAPTRANS™2018 contains a new datum transformation based on the updated
ETRS89 coordinates of realisation ETRF2000(R14). Next to this, a new and
slightly more precise quasi-geoid grid model is used. This NLGEO2018
quasi-geoid model covers a larger area including a large part of the North
Sea. A change with big impact is the use of a new data format of the grid
files and a corresponding transformation procedure that changes the order
of the steps of the transformation and uses a fixed height in the datum
transformation. As a result, the transformation is now possible conform a
de facto standard by including the datum transformation in the correction
grid (variant 2). This allows straightforward implementation in software
like GIS packages and can resolve current problems due to incorrect
implementations of the transformation.
.
Within the administrative borders of the Netherlands, the differences in
the resulting horizontal coordinates due to the changes from version 2008
to 2018 of RDNAPTRANS™ are at maximum 0.010 m at sea level (zero NAP
height), and at maximum an additional 0.001 m per 50 m height above or
below zero NAP height. The maximum change in the transformed height
coordinates due to the slightly more precise new quasi-geoid grid model
is about 0.025 m. The new correction grid has a different sampling in
ellipsoidal coordinates. With this resampling, discontinuities in the
correction grid are smoothed, especially outside the administrative
borders of the Netherlands, to allow bilinear interpolation. As a result,
changes in the resulting horizontal coordinates up to 0.05 m occur
occasionally in Belgium, Germany and the Dutch EEZ. To use the same
bounding box around the Netherlands including the Dutch EEZ of the
North Sea of the quasi-geoid grid model for the correction grid, the
correction grid has been faded out to zero correction for a seamless
land-sea transition. This introduces latitude and longitude corrections
up to 0.25 m in areas outside the former validity area of RDNAPTRANS™
where no corrections were defined before.
.
There are two variants for the implementation of RDNAPTRANS™2018.
Implementation variant 1 applies the datum transformation as a separate
step using a 3D similarity transformation. Implementation variant 2
includes the datum transformation in the correction grid and a different
quasi-geoid grid for the height transformation is used. The advantage of
implementation variant 1 is that it has no strict bounds for the area
where horizontal coordinates can be transformed correctly. The
disadvantage is that many software packages do not support
implementation variant 1. Implementation variant 2 is supported by more
software but can only be used within the bounds of the correction grid.
The difference in the resulting coordinates between the two variants is
well below 0.0010 m within the bounds of the RDNAPTRANS™2008 grids.
Although transformation at sea and even outside the grid bounds is
possible, the scale factor of the map projection increases rapidly and
also the precision of transformation back and forth deteriorates. There
are bounds to the recommended use of RD and NAP at sea and outside the
Netherlands.
......@@ -21,7 +21,7 @@ VERSION="2008+2018"
TARDIR=${NAME}-${VERSION}
# RDNAPTRANS2008
# https://www.kadaster.nl/documents/20838/87996/RDNAPTRANS2008/93c6e723-9e85-4b9d-abcb-a569e447d564
# http://gnss-data.kadaster.nl/root/misc/rdnaptrans2008/RDNAPTRANS2008.zip
#
# Download page:
# https://www.kadaster.nl/rdnaptrans2008-download-
......
This diff is collapsed.
add-test.patch
add-test2018.patch
......@@ -9,6 +9,7 @@ override_dh_auto_test:
ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
if [ 6 -le "$(shell cs2cs 2>&1 | head -1 | cut -d' ' -f2 | cut -d'.' -f1)" ]; then \
PROJ_LIB=.:/usr/share/proj perl ./testrdtrans2008.pl -v; \
PROJ_LIB=.:/usr/share/proj perl ./testrdtrans2018.pl -v; \
else \
PROJ_LIB=. perl ./testrdtrans2008.pl -v; \
fi
......
# No usable upstream URL for uscan, use get-orig-source script instead.
debian-watch-file-is-missing
# File added via patch
file-without-copyright-information Z001_ETRS89andRDNAP.txt
file-without-copyright-information epsg
file-without-copyright-information rdnap
file-without-copyright-information testrdtrans2008.json
file-without-copyright-information testrdtrans2008.pl
file-without-copyright-information testrdtrans2018.json
file-without-copyright-information testrdtrans2018.pl