GMAP - Geographic mapping and palaeoreconstruction package.
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In this account we describe GMAP, a combined palaeomagnetic database, geographic mapping and palaeoreconstruction package. GMAP is written for IBM AT compatible computers and the package contains approximately 1 Mbyte of geographic data, i.e. continental grid data, political boundaries and magnetic anomalies from the Central and Northern Atlantic. Large palaeomagnetic data- bases from Scandinavia, the British Isles and th USSR are also included. In addition selected palaeomagnetic data from Spitsbergen, Central Europe and North America\/Greenland are included. The palaeomagnetic data and files containing information on finite rotation poles are used for palaeorecon- structions, but GMAP also allows interactive translation of continents.