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Representing polarity correspondence between object and extrinsic axes. The [pointed] pole of the object’s principal axis is mapped onto the [up] pole of the extrinsic vertical axis, and the [straight] pole of the object’s secondary axis is mapped onto the [right] pole of the extrinsic horizontal axis. (V = extrinsic vertical axis; H = extrinsic horizontal axis; P = object principal axis; S = object secondary axis)
