I for one can understand that no company (like Tele Atlas) has tried to make digitized maps for Pakistan.
Problem is that anything that guides u on the basis of the current GPS system could be switched off or atleast made so inaccurate that such a usage becomes useless.
GPS is administrated by the US Military. It has two Frequency bands. The one common man uses is the Frequency Band made public to all companies who build GPS embedded devices (Like Car DVD navigation, Mobile Phones, PDAs etc. ).
The other Frequency Band is a strictly for Military use. Like Missile guidance, Fleet guidance and other needful functions.
Now it's well known that the US Military use to decrease the accuracy of the Satellite Signal in crises areas (or those which r considered foe areas) or even completly swtich off the Signal for a certain area. Just to prevent misuse.
Now imagine a Company spents millions for making digitized maps of Pakistan and then lack of reliability of GPS. Given the fact that all those mapping softwares will land on Hallroad, lahore for a mere Rs. 100 or even less who can be blamed for not undertaking such a risky terrain.
EU/ESA also has several GPS satellites which have nothing to do with the US military, Galileo, being one launched recently.