Thanks Sanderd17, now I figured out... You are absolutely right on it.
I am going to choose whether online or wieland's approach. Actually I have already done a demo based on wieland's idea but in order to support more reality, i posted and Sanderd17 helped me a lot. Thanks guys. I appreciate your any helps.

Good day everybody!
Thanks so much to reply.
If I give a description for my job, I get airplane positions from radar and should be displayed on the map. It is not a mobile based but windows. I developed my S/W in c#/.NET framework and I should synchronize with any kind of world maps. It would be great if I get open source programs.
Any suggestions to use the map in offline for my this condition?
Operations: Drawing, Rendering, Data exchange between my S/W and map program.

Any helps appreciated! Thanks a lot.
BS Mashhur.