If anyone is interested and would find this helpful, there are a number of photos of an official field from just before kickoff. There are two sets, one of the field and field components, and the other is totes that might be useful for writing vision code.
Both can be found here:
http://wp.wpi.edu/WPILib and are in two zip files in two of the posts there.
In addition, there are a a few hours of robotics videos that you might find useful in some of the other posts.