World Coordinate Systems in
Five WCS modes
27 proposed FITS standard WCS types
Digital Sky Survey plate solutions
approximate plate-tangent WCS given a plate center and scale
IRAF TNX polynomial projection.
SAO polynomial projection.
Keyboard and Cursor Commands
Command Line Options
Multiple WCS Support
Append the WCS position for the current cursor location to a file
to identify the closest HST Guide Star
Find an image star in various catalogs.
to display catalog stars on an image with a WCS.
Setting an Image WCS
has been developed to set the WCS of an image by matching stars images to a catalog, such as the HST Guide Star Catalog or the USNO A 1.0 Catalog, with no user interaction.
The subroutine library,
, used by SAOimage is available for inclusion in other programs.