getPixelSizes

Callable

• getPixelSizes(frame: FrameStore, rounding?: number): { x: number; y: number }

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• Calculates the pixel sizes (in arcseconds per pixel) along the rendered X and Y axes by measuring WCS geodesic distances around the reference pixel (CRPIX).

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  Parameters

  • frame: FrameStore

    The FrameStore providing WCS transform (frame.wcsInfo) and FITS headers

  • optionalrounding: number

    Optional number of decimal places to round the pixel size in arcseconds. If omitted, raw (unrounded) arcsecond values are returned.

  Returns { x: number; y: number }

  An object with { x, y } pixel sizes in arcseconds; NaN values if they cannot be determined

  • x: number

  • y: number