Set Linear Scale
The Set Linear Scale command attaches a linear coordinate system to the X and Y axes of the image. The scale is equally applied to both the X axis and Y axis.
This command is opened from the Process > Coordinates menu.
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Properties of the Set Linear Scale command |
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Profile |
Selects the parameter profile for this command. |
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[Select] |
Selects the source images from an image window, folder, files, pattern, or a file list. |
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Scale |
Enter the value in linear units per pixel. |
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Coordinate Unit |
Specify the units to be attached to this coordinate system. |
This command applies a World Coordinate System ("WCS") calibration to the image or image set. This calibration replaces any existing WCS. However, this command creates an Undo copy so that you can use the Edit > Undo (Ctrl+Z) command to restore the previous coordinate system. If you want to save the arcsecond calibration, save the image in the normal way. The screenshot below shows the keywords added to the image header by this command. Thse are shown in the FITS Header Pane.
Set Linear Coordinate Units, Set Equatorial Scale, Set Arcsecond Scale, World Coordinate System