Re: PDA, GPS maps and Jamaica
there is a 'pay' GPS. It is known as differential gps (DGPS) and american & canadian pilots have a (kinda) working system called wide area augmentation system (WAAS). I b-leve thar spatial innovision is/has/will soon set up a couple DGPS sites here and have DGPS corrections via gprs. So if you need sub-milimetre accuracy from your gps give 'em a call
all the labours of the ages, all the devotion, all the inspiration, all the noonday brightness of human genius, are destined to extinction in the vast death of the solar system, and that the whole temple of Man's achievement must inevitably be buried beneath the debris of a universe in ruins - Bertrand Russell