Here’s a 30"x40" map of San Francisco,made from painted draftboard mounted on foam board. I made the svg file on Illustrator and broke it into six pieces. The seams can be seen in the final piece. I had some trouble using the clipping mask to divide my image into six pieces - doing so leaves all the hidden nodes and strokes in the file, so the file was too big for Glowforge to handle.
The ugly hack that worked for me was to draw a 10.5"x18" rectangle in Illustrator, “group” it with the underlying map, then carefully using “erase” to remove all the nodes and strokes outside the rectangle. That made the resulting file size small enough for the Glowforge to handle.
Now that I know how to do all this it would be a lot easier the next time around, but it’s still about six hours of total cutting time to make one of these.
You’re think of “divide” I believe. That would leave excess anchor points and can behave unpredictably. Minus fronting on 4 copies is more reliable. The most reliable thing in AI to do this tho is the Shapebuilder tool.