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A series of archeomagnetic measurements have been carried out on archeologic materials from Arizona and Mexico which can be compared with results from Europe and Asia. This comparison shows a westward drift of geomagnetic intensity at a rate of about 0.24 degree per year. Furthermore, an apparent coincidence between changes in the earth's magnetic moment(More)
It is widely accepted that automatic interpretation of drawings and documents will not be achieved in the short to medium term and that manual digitisation is not an acceptable alternative. Despite this there has been little systematic discussion of the role of the user in line drawing interpretation. We consider desirable properties of human interaction(More)
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