The Davison chart (also known as 'relationship chart') is one of a number of techniques for assessing the compatibility of people, and the characteristics of a group dynamic. It can be used an alternative - or an addition - to synastry, but it has wider application. For example, Davison charts are typically cast for two men. The characteristic of the Davison chart is that it is not theoretically limited in the number of nativities that can be subsumed into one chart.
Davison charts can utilize a variety of methods for the technical averaging of the birth details of the individuals. The method used in ZET results in a chart which can be progressed, transited, etc (unlike the better-known composite chart).
To erect a Davison chart: