  We present a technique that combines Zeeman Doppler imaging (ZDI) principles
with a potential field mapping prescription in order to gain more information
about the surface field topology of rapid rotators. This technique is an
improvement on standard ZDI, which can sometimes suffer from the suppression of
one vector component due to the effects of stellar inclination, poor phase
coverage or lack of flux from dark areas on the surface. Defining a
relationship beween the different vector components allows information from one
component to compensate for reduced information in another. We present
simulations demonstrating the capability of this technique and discuss its
prospects.
