----------------------------Original message---------------------------- Hello Folks! I am trying to import various maps into a GIS based transport planning program and I am having trouble finding equivalent "projections" so that I can adjust my map layers to make them match up. Using several maps with different projections requires "registering" each map with a transformation filter to make them all compatible, and some of the maps I have don't correspond with the choices in the software program. I have one map thats done with a "Cylindrical Transverse Equal-Area Projection" and another one with a "Space Oblique Mercator Projection". However, the only choices I have in my software program are as follows: In the Middle Latitudes: Albers Equal Area Near Sided Pers, South Oblique Lambert Conformal Conic Orthographic, South Oblique Lambert Equal Area Stereographic, South Oblique World Projections: Equal Area = EA Bonne EA Collignon EA Eckert II EA Eckert IV EA Eckert VI EA Equidistant Cylindrical Fahey Gall Stereographic Goode Homolosine EA Lambert Azimuthal EA Lambert Cylindrical EA Loximuthal McBryde-Thomas FP Parabolic EA McBryde-Thomas FP Quartic EA McBryde-Thomas FP Sinusoidal EA Mercator (conformal) Miller Mollweide EA Near Sided Pers. - Equatorial Near Sided Pers. - North Oblique Near Sided Pers. - South Oblique Orthographic - Equatorial Orthographic - North Oblique Orthographic - South Oblique Putnins P2 EA Quartic Authalic EA Robinson Sinusoidal EA UTM Van der Grinten Werner EA Winkel 1 Does anyone know what the closest match would be among the choices I have available for transformations?? Much thanks in advance (and even just for getting all the way through this wacky message)!! By the way, the map is of the western borders of Argentina. Michelle <[log in to unmask]>