Gert,
The info you just provided is sufficient to offer the following:
The Lambert Conformal Conic has not been used in Australia since before
WWII for large-scale mapping. Therefore, what you probably have is a data
set that is derived from small-scale cartographic sources such as 1:500,000
to 1:10,000,000 scales. At those scales, datum and ellipsoid are not
material. The distortion from the paper the original map is printed on is
greater than the distortion from using a spherical projection.
The most common projections of the world that use such a projection is the
WAC or World Aeronautical Chart. Offhand, I don't recall what the
specifications are on the standard parallels, but they are probably
symmetrical about each of the poles. Last time I diddled with the WAC
specs was in the Fall of 1967!
Most map projection packages that come with GIS software usually have such
specs hard-coded into the utility applications.
I would recommend that you inquire to the general community of MapInfo
users as to what the WAC specs are. Since that is much smaller a scale
than what I pay attention to regarding grids and datums, I am ignorant of
the particulars.
Hopefully this hint will resolve your puzzle.
Good Luck!
Prof. Clifford J. Mugnier ([EMAIL PROTECTED])
Surveying, Geodesy, & Photogrammetry
LOUISIANA STATE UNIVERSITY
2408 CEBA Building
Baton Rouge, LA 70803
Voice & Facsimile: (225) 388-8536
Beeper: 1-(888) 365-5180
Corps of Engineers: (504) 862-1094
Home: (504) 286-1200
======================================
SEE: http://www.ASPRS.org/resources.html
======================================
projection is Lambert Conic and the units is meters, I'm 99% sure the datum
is AGD66, the rest, I have no idea.
What other details might help?
Gert
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