This document introduces some of the techniques that we have developed, the resulting maps, and their application in the HCV process. We provide lists of relevant reference material and online resources, and outline next steps. This is intended to assist working groups, technicians and institutions involved in defining national HCV criteria in Gabon, or indeed elsewhere in the region, in particular in the context of a National Interpretation. It can also be a useful reference for those conducting HCV and Environmental and Social Impact assessments.