a method of displaying enhanced map information on a pnd , and a pnd capable of displaying such enhanced information is described . in accordance with the invention , the pnd determines its velocity and displays map information on a display screen thereof . the map information is continually and / or periodically refreshed to take account of the displacement of the device brought about by its velocity . the invention is characterized in that the extent to which the map information displayed is enhanced to include one or more enhanced features is dependent to some degree on the velocity of the pnd , said enhanced features being chosen from the group containing : building textures , digitized photographic images of building facades , landscapes , discrete areas of land and buildings , vistas , patterns representative of land use , street lights , electricity pylons , tram rails , train rails , zebra crossings and traffic signs , types of road surfaces or patterns indicative thereof , road markings , traffic lights , landmarks in the distance or digitized photographs thereof , cities in the distance or digitized photographs thereof , animated patterns , bicycle lanes , bus lanes , graphically or textually represented commercial , agricultural , tourist or traffic information , and enhanced poi icons .