Map reference grid question

Submitted: Wednesday, Sep 14, 2005 at 01:37
ThreadID: 26440 Views:3248 Replies:5 FollowUps:5
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OK, I bought a 1:100 000 topographical survey map. I scanned a section of this and plan to import it in to ozi explorer.
To calibrate this section I would need the exact lat/long of selected calibration points.

I have no trouble dealing with lat/long coordinates but this map shows only a few of these on the margin and at the wrong area. There are lots of black grid lines, at 1000m interval, and numbers against them at the margin to establish a grid reference.
The map has this reference in the SW corner: 6494000mN, 547000mE

So, I obtained a sample grid reference point : 2431-660160
How do I convert this figure into lat/long?

I did look up google and there are calculators for the northern hemisphere as well as lots of confusing math formulae - totally mind boggling.

Anybody know of a simple way to do this or of a userfriendly web calculator for Australian locations?

Klaus
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