Here is how to make nice quality custom banners like my banners (except for the the city one, I really dont know what to put there)
Step I: Search for an image you would like to have as your banner in your preferred search engine. This is done on Google.
Step II: Once you find your desired image click on the button search image.
Step III: Save the biggest image to your computer. On Google picture size format is P×Y (ex: 1200×500) Choose the picture with the highest number.I say biggest image because the bigger the image the less pixels will be noticeable on the banner.
Step IV: Go on photo editing websites that allow you to crop the photo. But specifically one that lets you enter the ratio of the cropped photo. For this post I will use Croppola.Feel free to use any other website that does the same function that you prefer.
Step V: Change the photo ratio to 4:1 as this is the desired ratio for banners.
Step VI: Expand and/or move the cropper as desired.
Step VII: Download the image to your computer.
Step VIII: Go on nationstates.net and click banners on the upper right of the banner.
Step IX: Upload the photo in the custom banner field.
Step X: Enjoy your beautiful quality banner!