This document extends ISO 19115-1:2014 Geographic information -- Metadata -- Part 1: Fundamentals by defining the schema required for enhanced description of the acquisition and processing of geographic information, including imagery. Included are the properties of measuring systems and the numerical methods and computational procedures used to derive geographic information from the data acquired by them. This document also provides the XML encoding for acquisition and processing metadata thereby extending the XML schemas defined in ISO 19115-3.