  Copulas are becoming an essential tool in analyzing data thus encouraging
interest in related questions. In the early stage of exploratory data analysis,
say, it is helpful to know local copula bounds with a fixed value of a given
measure of association. These bounds have been computed for Spearman's rho,
Kendall's tau, and Blomqvist's beta. The importance of another two measures of
association, Spearman's footrule and Gini's gamma, has been reconfirmed
recently. It is the main purpose of this paper to fill in the gap and present
the mentioned local bounds for these two measures as well. It turns out that
this is a quite non-trivial endeavor as the bounds are quasi-copulas that are
not copulas for certain values of the two measures. We also give relations
between these two measures of association and Blomqvist's beta.
