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Transforming Between Celestial and Pixel Coordinates

If you want to find where-abouts in an image a particular point on the sky is positioned, or conversely what celestial coordinates correspond to a given position in the image, SKYPOS can be used. SKYPOS can also give information about the local pixel dimensions and image orientation at any position within an image. These can vary across large images because of projection effects.



next up previous contents
Next: Producing a Hard-Copy Contour Map Annotated with Celestial Coordinates
Up: Recipes for Common Operations
Previous: Displaying an Image Annotated with Celestial Coordinates

IRAS90 --- IRAS Survey and PO Data Analysis Package --- Reference Guide
Starlink User Note 163
David S. Berry, W Gong, D C Parsons
19 February 1995
E-mail:ussc@star.rl.ac.uk

Copyright © 2008 Science and Technology Facilities Council