Baryon Electromagnetic Form Factors at BESIII

The BESIII experiment is running on the double-ring symmetric collider, BEPCII, at center-of-mass energies between 2.0 and 4.6 GeV. The collected data can be analyzed to measure the baryon electromagnetic form factors in direct e(+)e(-)-annihilation and in initial state radiation processes. In this paper, results on e(+)e(-) -> p (p) over bar and preliminary results on e(+)e(-) -> Lambda(Lambda) over bar based on the data collected by BESIII in 2011 and 2012 are presented. Preliminary results on the proton electromagnetic form factors measurement are also reported based on the analysis of e(+)e(-) -> p (p) over bar gamma with 7 data samples at center-of-mass energies between 3.773 and 4.6 GeV.