Not unless you wanted to separate each of them out into an image per district and trace them that way. When you get to that amount of work it could be faster just to import the image and draw the districts by hand.

Going back to the tracing job on the outline...

The result seems a little pixelated to my eye compared with the original. This can happen if the image being traced is too low in resolution or if the edge between the opaque parts and the transparent parts are not well defined. If you want to improve on that result see if you can make the image both larger (more pixels in a bitmap editor) and more sharply defined.

@JimP - No worries :) I guessed as much.

That looks better now, Jim :)

I think the hills would probably benefit from having less shadow.

Yes, I remember there being something myself but I can't find it now either. We must both be using the same 'wrong' search words.

But never mind - I can possibly help you here.

Make a new sheet immediately above the one with the repetition issue (under it in the sheet listing because the sheet listing is upside down to most people's way of thinking).

Either:

1. use one of the semi transparent fills (denoted by having a 'T' in the fill name in DD3) in patches on that sheet, or
2. add an Edge Fade Inner sheet effect to the new sheet, and then draw patches of similar textures on that. When you refresh the drawing the EFI will blend the edges into the old sheet.

It's more effective to use similar textures rather than the same one. For example if you have several shades of grass use one of the other shades of grass to patch the original grass.

It can take a little practice to get the second method to work correctly, but I've found it more effective than the first one.

...

EDIT: It is also worth remembering that repetition becomes far less obvious when there are more objects in the map, so if you are staring at just the background with nothing else at the beginning of a map you will inevitably see the pattern. It might be worth finishing the map before you decide to go through the process of patching.