Polar/Arctic/Antarctic Projection Systems
In the Assign Coordinate System dialog, the coordinate systems under Predefined are separated into different categories.
The Polar/Arctic/Antarctic category contains different projections that can be used near the north and south poles. Several different projections fit into this category: Lambert Conformal Conic, Orthographic, and Stereographic. Coordinates are always in latitude and longitude. The difference between the projections are in the definition of the false easting, northing, central longitude, central latitude, standard parallel or datum. Projections are defined for specific regions. Properties for each coordinate system and datum are listed in the dialog by clicking on the desired system.
See Also
Assign Coordinate System dialog
Latitude and Longitude Coordinates
Latitude and Longitude in Decimal Degrees
Using Scaling to Minimize Distortion on Latitude/Longitude Maps