A method and apparatus for locating items on a physical document and a
method for creating a geographical link from an electronic document to
the physical document. The geographical link is created by encoding, in a
geographic link to the physical document, geographic coordinates of a
referenced item in the electronic document. The electronic document is
not derived from the physical document. Locating items on the physical
document includes calibrating an opto-touch foil that is aligned on the
physical document, including processing a calibration location included
in locations appearing in the physical document and referred to in the
electronic document. For each location, foil coordinates of the
opto-touch foil corresponding to where each location appears in the
physical document are computed utilizing geographic coordinates of each
location and a generated calibration relationship between the geographic
coordinates of the calibration location and calibration foil coordinates
of the opto-touch foil.