Arduino duemilanove board pin dimensions

I want to build my own shield. I’m looking for the dimensions for the rows of pins on the sides. I have measured the pin spacing from side to side as 1.9", the gap between the two headers on the power/analog side as 0,.2" and the gap between the two headers on the data side as 0.17. The pins on the board end farthest from the power/usb connectors appear to be aligned. Can anyone confirm that information?

Thanks,

Jim.