[texhax] zref-savepos in landscape mode

[Bob Tennent]

 >|it is not safe to rely on absolute values that can
 >|be obtained via \pdfsavepos. It is better to use a reference
 >|point and to use relative positions.

Thanks. For post-processing, I need to be able to generate the
coordinates of a point on the page. What "reference point" would be
suitable? Can I determine the coordinates of the "TeX origin"?

Best,
Bob T.