Wow thanks it's great stuff. I managed to improve considerably the map so far. I cleaned up the meridians and exceeding islands, cleaned up the edges (although it needs refining) and added a nice background. Now i need to see if i can add some effect for the sea. I am also concerned with the pixelisation of the land. Is there any effect to improve the quality of it without affecting it too much?
Here is what i have done so far. (Sorry, i keep using google.sites)