To be honest, that needs alot of work...
Things to point out:
> Layout the waypoints abit better, they don't need to go directly from one base to the other.
> Fix the roads, they're not connected properly.
> Leave some border area, don't have them at zero.
> What's the bridge and aircraft carrier outside the map area for?
Tips for map making:
> Choose a theme, what type of map are you making? Is it a urban city? It is a countryside setting? Is it a battle torn town? Land on a decision.
> Vary the texture, a single texture over a large area looks bad.
> Vary the ground height, large flat grounds for country scenes are not interesting.
> Make cliffs and ridges actually cliff and ridges, there are several cliff textures you can choose from.
> Don't leave large chunks of land with nothing on them, unless of course you're making the Sahara Desert.
> The cities are not paved with concrete or mud, spread some grass areas around the town area with trees and some dirt, make a park or something.
> Sidewalks can further imrpove your map's details and make them more appealing.
> Place objects sensibly, you wouldn't see a destroyed tank, battle bunker or an artillery placement in a peaceful city.
> Vary the objects respectively to what they are, you would rarely find a entire forest of just dogwoods, but you can find large amount of palm trees on a beach area.
> Build more routes of attack, a single bottle neck entrance may sound good to the player but they rarely make the game play interesting and limits players to only one possibility of offense by ground.
