Before people go too far looking for such charts, I have a question: is it possible to have 4 points in a plane, no 3 colinear, so that all 6 distances are integers? And with the additional constraint that no 2 distances are equal?

it is possible to have arbitrarily many points in the plane, no three collinear, such that all distances between them are integers, and no two such distances are equal. mike