[Manifold-l] Projection Query - regarding Map Grid of Australia 1994, Zone 54...

[adamw at manifold.net]

> I recently imported an ESRI Grid into Manifold (v 6.5 build 408) as
> a Surface.  The surface is a lidar derived digital elevation model of
> part of Western Victoria (Australia) with a cell size of 10 metres.
> The projection used by this data is the Map Grid of Australia 1994
> (zone 54).  Based on the Geocentric Datum of Australia 1994
> (GDA94) the Map Grid of Australia 1994 utilises a Universal Tranverse
> Mercator projection (with 6 degree zones) with a scale factor of
> 0.9996 at the central meridien and a false northing of 10,000,000
> and a false easting of 500,000.  Map units are metres.
> 
> What I can't understand is why I see the appearance of a 'local
> offset' of 495000.00 in X and a local offset of 5880000.00 in Y.
> What is this 'local offset' about?

This has been answered in this forum thread:

http://forum.manifold.net/Site/Thread.aspx?id=29900

--
Adam Wachowski
Manifold Development Team