I would recommend shooting the image again. Just set the in-game resolution to full hd. Then you could use the clear map image
I suggest you take care of the models' resolution too. You can use my enhanced textures and additionally enlarge the volcanic tiles. They can be found under \Acclaim Entertainment\Machines\models\planet\multidog\texture4.
Good luck with that :)
Back in 2011 I enlarged (using some quality-assuring algorithms) all the texture4 files. This includes all the machines, buildings and weapons. The effect is pretty cool if you ask me. You can see for yourself:
Just download the zip and extract it to your Machines/models/texture4 and texture2 folders.
Check these files here:
The zip consists of all software needed to follow the http://wiredforwar.wikia.com/wiki/Map_making_tutorial.
I've just added a comment to the article, if you could support me I would be very grateful.
Good to see something's happening in Machines Community :)