[FWTools] ITRF2000 to GDA94 transformation

[Mikhail Tchernychev]

  Hello All,

I am trying to convert ITRF2000 to AGD94 with the following command:

cs2cs +from -w4 +proj=latlong +datum=WGS84 +to 
+towgs84=0.0394,-0.0574,-0.1383,0.019622,0.016407,0.020235,0.002286 
+proj=latlong <<EOF
131d07'57.8682"E 12d50'37.3278"S 125.218
EOF

The correct answer is

Latitude : 12° 50’ 37.3278” South
Longitude : 131° 07’ 57.8682” East
Ellipsoidal Height : 125.218m

cs2cs shows as

131d7'57.8478"E 12d50'37.3486"S 125.241


I wonder anyone has expireince with ITRF2000 to GDA94

The complete information is here:

from ITRF2000
Datum : ITRF2000
Ellipsoid : Geodetic Reference System 1980 (GRS80)
Semi-major Axis (a) : 6 378 137.000m
Semi-minor Axis (b) : 6 356 752.314m
Eccentricity Squared (e²) : 0.006 694 380
Flattening (1/f) : 298.257 222 101


to GAD94

Datum : Geocentric Datum of Australia 1994 (GDA94)
Ellipsoid : Geodetic Reference System 1980 (GRS80)
Semi-major Axis (a) : 6 378 137.000m
Semi-minor Axis (b) : 6 356 752.314m
Eccentricity Squared (e²) : 0.006 694 380
Flattening (1/f) : 298.257 222 101

7 parameters:

Epoch = 2010.5
Dx = +0.0394m
Dy = -0.0574m
Dz = -0.1383m
Rx = +0.019 622"
Ry = +0.016 407"
Rz = +0.020 235"
Scale = +0.002 286 p.p.m.

Sample point:

Datum : International Terrestrial Reference Frame 2000

Latitude : 12° 50’ 37.3278” South
Longitude : 131° 07’ 57.8682” East
Ellipsoidal Height : 125.218m

Datum : Geocentric Datum of Australia 1994 (GDA94)
Latitude : 12º 50’ 37.3584” South
Longitude : 131º 07’ 57.8484” East
Ellipsoidal Height : 125.197m

Thank you very much for looking!

Best Regards,
Mikhail