[Proj] ACT Standard Grid (AGD66)

[Michel.Dastous at bentley.com]

Hi,

I'm currently trying to publish an Oracle dataset marked as SRID 82474 and cannot determine the proper proj4 init string corresponding to it.  I was able to extract the WKT definition from Oracle:


PROJCS["ACT Standard Grid (AGD66)", GEOGCS [ "Australian Geodetic 1966 ACT", DATUM ["AGD 66 ACT", SPHEROID ["Australian", 6378160, 298.25],-129.19,-41.21,130.73,-.25,-.37,-.33,-2.96], PRIMEM [ "Greenwich", 0.000000 ], UNIT ["Decimal Degree", 0.01745329251994330]], PROJECTION ["Transverse Mercator"], PARAMETER ["Scale_Factor", 1.000086], PARAMETER ["Central_Meridian", 149.0092948333], PARAMETER ["False_Easting", 200000.000000], PARAMETER ["False_Northing", 4510193.4939], UNIT ["Meter", 1.000000000000]]

The best we have is:
+proj=tmerc +lon_0=149.0092948333 +k=1.000086 +x_0=200000 +y_0=4510193.4939 +ellps=aust_SA +towgs84=-129.19,-41.21,130.73,-.25,-.37,-.33,-2.96 +units=m +no_defs  <>

Unfortunately this produce a displacement of around 200 meters when  reprojected to Bing coordinate system.

Can anyone help?

Thanks,

Michel
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