The encoded image data is rotated 90° clockwise from the image's intended display orientation.
Mac Catalyst 13.0+
The (x,y) pixel coordinates of the origin point (0,0) represent the top row and rightmost column, respectively. Pixel (x,y) positions increase top-to-bottom, right-to-left.
If an image is encoded with this orientation, then displayed by software unaware of orientation metadata, the image appears to be rotated 90° counter-clockwise. (That is, to present the image in its intended orientation, you must rotate it 90° clockwise.)