Coordinate Systems
The topics below discuss how Mira works with the coordinate systems of images and plots.
Describes the FITS World Coordinate System. |
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Describes how coordinate systems are used for measuring distances, angles, centroid positions, and other quantities in images. |
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Describes how pixels are referenced and counted in image coordinates. |
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Describes how fractional pixels are counted in image coordinates. |
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Describes how angles are measured for different coordinate systems. |
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Describes how coordinate systems are used in displaying 1-D data. |
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Describes how 1-D plots implement the image coordinate system. |
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Describes how rows are counted in different image formats. |
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Describes how FITS format images are oriented for display. |
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Describes real-time readout of the image pointer (crosshair). |
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Describes how to adjust and position the image cursor. |
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Describes header keywords used to describe world coordinate systems. |
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Configures the X world coordinate display when the X coordinate is calibrated in linear units. |
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Configures the Y world coordinate display when the Y coordinate is calibrated in linear units. |
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Configures the display of pixel (Z) values. |
The topics below discuss tools used for calibrating and working with world coordinate systems
Creates a "plate solution" for an image using the coordinates of at least 3 marked stars. |
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Assigns an arcsecond scale to an image. |
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Assigns a simple equatorial coordinate system of (right ascension, declination) to an image. |
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Sets linear coordinate scales that differ in each axis. |
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Sets the name for linear coordinate units in each axis. |
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Deletes any type of World Coordinate System scale from the image, reverting it to the (column,row) system. |
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Lists the values of world coordinate system keywords in the image header. |
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Moves the image cursor to a target position, or loads the current position in either pixel or world coordinates. |