Active region 8210's magnetic structure is analyzed from magnetograms taken on May, 1, 1998. Uncertainty is estimated in the vertical and transverse field. The magnetic flux and magnetic energy are calculated. Mean alpha and alpha as the slope of the jz vs. bz plot are assigned to the active region at each time. The 3D potential field and the linear force-free field are created using a Fourier Transform. From this 3D data field lines of the coronal magnetic structure are plotted and analyzed, and the magnetic energy is calculated.