--- Start of Idrisi List message The transverse form of the Mercator projection was first described by Lambert (in the late 1700's), but only in its spherical form. In the early 1800's, Gauss described the ellipsoidal form. Finally, in the early 1900's, Kruger published formulas for the ellipsoidal version. As a consequence, the projection, in its ellipsoidal form, is known variously as the Transverse Mercator, the Gauss Conformal, or the Gauss-Kruger. The latter term is more popular in Europe while the former is more popular in America. In IDRISI for DOS Version 4.1 and IDRISI for Windows Versions 1 and 2, you should specify your projection as "Transverse Mercator". In IDRISI32 you can also enter "Gauss-Kruger" since it also understands this key word to be equivalent to Transverse Mercator. With regards to whether it matters at 1:10,000, the answer is almost always yes, but sometimes no. It all depends on how close you are to a standard point or line and the extent of the coverage. You should always take care with this, if for no other reason that it establishes a basis for transformations. For example, your GPS information can easily be projected to the characteristics of your map (or vice versa) if you establish a proper REF file. With regards to downloading Garmin GPS III tracks, CartaLinx supplies a free utility called "Waypoint Plus" that can be used for this purpose -- you should find it on your Version 1.2 CartaLinx CD. Good luck! Ron Eastman --- End of Idrisi List message IDRISI-L is an unmoderated list. As a service to list users, please post a summary of useful responses to your questions. To post a message to IDRISI-L, send it to [EMAIL PROTECTED] To subscribe to the list, send an email from the address to be subscribed to [EMAIL PROTECTED] with "subscribe" (without quotes) as the first line of the message body. To unsubscribe, do the same, only with "unsubscribe" as the first line of the message body.
