I use spreadsheets like Excel for everything. Probably for too many things. I have a 25 megabyte spreadsheet that puts the coordinates of the Earth's ocean boundaries on an unfolded northern hemisphere.

Click on the image for a really large PDF file that you can print on 11x17 paper and cut out yourself.

I'm still deciding what to put on the actual dome covering. Ideas include:

• Brain map
• Golf ball
• Hemisphere of globe
• Multi-sided die