Cliff Thanks for the insight on GDA94 and WGS84, and my apologies for generalising the term projection - which is the way the earth is presented as a flat surface (eg. on paper) for measuring. Datum's represent the measuring system used.
However, I will jump over to your sight for the definitive word on the difference between the two. Greg Gainey -----Original Message----- From: Clifford J Mugnier [mailto:[EMAIL PROTECTED] Sent: Saturday, 29 May 2004 4:06 AM To: [EMAIL PROTECTED] Subject: Re: MI-L Difference between projections GDA94 & WGS84 Greg, For worldwide use, WGS84 is the preferred "standard." For all non-defence related GIS applications for all of Australia, the preferred "standard" is GDA94 because it is the legal standard for Australia. Except for sub-centimeter level geodetic esoterica, the two are identical. Note that these are datums and are NOT projections. If you don't know the difference, read my stuff at the "ASPRS" website listed below my signature block. Cliff Mugnier Chief of Geodesy CENTER FOR GEOINFORMATICS Department of Civil Engineering LOUISIANA STATE UNIVERSITY Baton Rouge, LA 70803 Academic Office Voice and Facsimile: (225) 578-8536 Research Office Voice and Facsimile: (225) 578-4474 ====================================================== http://www.ASPRS.org/resources.html http://www.cee.lsu.edu/facultyStaff/mugnier/index.html ====================================================== Hi listers Can anyone tell me the difference (geographically or other) between GDA 94 and WGS 84 map projections? Is there a universal standard preferred? Thanks GG --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 11956 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 11959
