One of the main strengths of ISOCARP is that it is a truly global association of planners
with some 80 countries now represented.
This provides a powerful knowledge base regarding the theory and practice of planning world wide, knowledge that is disseminated and shared at Annual Congresses and other events and through the Society’s publications. ISOCARP’s international network has also facilitated the assembly of
comparative material about the world’s planning systems. Thus, in 1989 the Society published its first edition of the International Manual of Planning Practice (IMPP) and this has since been updated and expanded several times. The most recent and most ambitious version was published in 2008.