Paint road map

[DoctorG]

I want to use a street map as the base graphics for 3D project. The data I have is in OSM (open street map) which I can convert to SVG or other 2D vector formats. I would then import that into XARA.

But once I have these 2D lines (which have the outlines of the roads, rotaries, intersections, parking lots, etc.) All I have is lines.

That gives me a lot of curves but nothing else. I want to paint the streets black (these are 2 and 3 lane roads, put markings on the streets etc.)

I have Photoshop and XARA (I prefer xara for this artwork) any idea on how to paint the trees, vegetation, and other street markings and make them stay in the outlines of the road?

For example, I would like to fill the road with black paint and put a yellow line down the middle. But roads are not necessarily water-tight, so fill is not the right tool.

It does not have to be as pretty as below, but that would be nice:

http://www.bi-constructionnews.com/u...der_7_3443.jpg