  We report the status of our nucleon structure calculations with 2+1 flavors
of domain wall fermions on the RBC-UKQCD $32^3\times64$ gauge ensembles with
the Iwasaki+DSDR action. These ensembles have a fixed lattice scale of 1/a =
1.37 GeV, and two pion masses of about 170 and 250 MeV. Preliminary results for
the isovector electromagnectic form factors and their corresponding
root-mean-squared (r.m.s.) radii will be presented.
