Bill Thoen wrote: > > Does MapInfo support the International Terrestrial Reference > Frame (ITRF) 92 datum? If not, can WGS84 be used as a substitute? > What are the differences between ITRF92 and WGS84?
The answers to above are: No. Yes. Not so much as to make any difference to MapInfo. Just about everyone pointed out the document at ftp://lareg.ensg.ign.fr/pub/itrf/WGS84.TXT. The only part I understood was that at the 1-meter level there's no difference between WGS84 and ITRF92. See also: http://hpiers.obspm.fr/ (homepage for the IERS - International Earth Rotation Service, Central Bureau) (Earth Rotation Service? ...I wonder if these are the guys who keep the earth's axle greased so that it doesn't creak at night?) Thaks for the help, everyone! - Bill Thoen --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 11882
