The method includes the steps of sensing a spatial pattern of densities in {HEAD ~ the media} along a scanned strip, saving the spatial pattern of densities during the initial pass to create a path map from the start position to an end point, comparing {TAIL ~ subsequently sensed spatial patterns} of densities to the path map, and following the path map to repeatedly and accurately position the media at any point along the scanned path 
The method includes the steps of sensing a spatial pattern of densities in { HEAD ~ the media } along a scanned strip , saving the spatial pattern of densities during the initial pass to create a path map from the start position to an end point , comparing { TAIL ~ subsequently sensed spatial patterns } of densities to the path map , and following the path map to repeatedly and accurately position the media at any point along the scanned path
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