Hello,
my Name is Sascha Wernicke and I'm working for a
consulting-company in
Luxembourg. We are using GRASS and QGIS to generate forestry
maps and to
so some raster-analysis. The reason why I'm posting this message
is,
that in Luxemburg we are using a special projection which is
called
LUREF.
I have inserted the details for the LUREF projection which I
have
received from the Luxemburgian Cadastral Office, at the end of
this
mail. Concerning this, I would ask whether it would be possible
to
create an own LUREF-projection which could be integrated in the
QGIS-project?
In advance I thank you very much for any help concernig this
subject.
Best regards from Luxemburg.
Sascha
NATIONAL DATUM of LUXEMBURG LUREF
1. National Datum Ellipsoid Parameters:
Semi-Major Axis a (m) : 6378388 m Flattening
1/f : 1/297
Semi-Minor Axis b (m) : 6356911.946 m
Eccentricity e2 :
0.006768170197
Ellipsoid : HAYFORD INTERNATIONAL 1924
Fundamental point (Laplace-point):
Habay-la-Neuve
(Belgium)
2. Details of the Luxemburg Projection System:
Name : Projection Gauss Luxembourg
Generic Projection Type : Transverse Mercator
Projection Parameters :
Longitude of Central Meridian : 6° 10’ East of
Greenwich
Central Meridian Scale Factor : 1
Longitude of Origin : 6° 10’ East of Greenwich
Latitude of Origin : 49° 50’ North of Equator
False Origin:
Position of False Easting : 80 000 m
Position of false Northing : 100 000 m
Worked example:
Latitude : 49° 34’ 17’’.60287 : X (North)
70910.00
Longitude : 5° 55’ 50’’.69323 : Y (East)
62935.00
NATIONAL LUXEMBURG HEIGHT DATUM
Name : NIVELLEMENT GENERAL DU LUXEMBOURG NG-L
Reference Point : Wemperhardt : Altitude :
528.030m
Reference Tide Gauge : Pegel Amsterdam
The NG-L is based on geometric levelling only,
it counts
3800 points which corresponds to a density of
1.8
points/km2.
3. Transformation Parameters from LUREF to
WGS84 /
EUREF89
A. Transformation Model : Molodensky - Badekas
Rotation Origin: X0 : 4098647.674 m
Y0 : 442843.139 m
Z0 : 4851251.093 m
Shift along the x-axis : -265.983 m
Shift along the y-axis : 76.918 m
Shift along the z-axis : 20.182 m
Rotation about the x-axis: 0.409900 ‘’
Rotation about the y-axis: 2.933200 ‘’
Rotation about the z-axis: -2.688100 ‘’
Scale factor : 0.4300000 ppm
B. Transformation Model : Bursa-Wolf:
Rotation Origin: X0 : 0.0000 m
Y0 : 0.0000 m
Z0 : 0.0000 m
Shift along the x-axis : -192.986 m
Shift along the y-axis : 13.673 m
Shift along the z-axis : -39.309 m
Rotation about the x-axis: 0.409900 ‘’
Rotation about the y-axis: 2.933200 ‘’
Rotation about the z-axis: -2.688100 ‘’
Scale factor : 0.4300000 ppm
--
WERNICKE Sascha
Ingénieur des Eaux et Forêts
Bureau d'études THALIS
9, um Sand
L-9459 Longsdorf
Voice: (+352) 26 80 49 22
GSM: (+352) 621 622 781
e-mail: sascha.wernicke at thalis.lu
visit our website: www.thalis.lu (under construction)
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