that chinese fella
6th Jul 2004, 07:28
Hi all,
can anyone point me in the direction for freeware/info on converting AMG grid coordinates to Lat/Long?
Cheers
TCF
Atlas Shrugged
7th Jul 2004, 00:06
Might be something in here
http://www.ga.gov.au/nmd/geodesy/index.jsp
AS
OZBUSDRIVER
7th Jul 2004, 12:41
Specificly you are looking for Redfearn's Formulae
Here are some sites that will help
http://www.agso.gov.au/nmd/geodesy/datums/redfearn_geo_to_grid.jsp
http://www.agso.gov.au/nmd/geodesy/datums/calcs.jsp
The last one here has access to an .xls spreadsheet
And if you realy want to kep yourself sleepless for a couple of nights, here is the actual formulae...
http://www.icsm.gov.au/icsm/gda/gdatm/gdav2.2.pdf
Go to page 23 on pdf viewer.
Had to dig cobwebs out of the brain I used to use for seismic surveying. Be careful using this to convert any grid co-ords from any maps made in NSW ,they have a different grid to the rest of Australia
Regards
Mark