  We present here a new method based on the Radon transform to model
Generalised Parton Distributions (GPDs). It allows to fulfil all theoretical
constraints applying on GPDs, especially polynomiality and positivity at the
same time. More specifically, we show how polynomiality can be systematically
restored within the framework of the overlaps of Lightfront Wave Functions
(LFWFs). It provides a systematic way to extend models defined solely in the
DGLAP kinematical region to the ERBL one. We then exemplify our approach using
LFWFs models.
