PCM is part of a spectrum of 3D measurement technologies, from mapping the Earth at one end to error mapping a Coordinate Measuring Machine (CMM) at the other. The buildings and machines we construct are part of our environment. Dimensional measurement is a key element in their manufacture and recording. The talks will present PCM systems and discuss their potential for further development. They will be delivered in English and it will help to have some small knowledge of the techniques and systems used in mapmaking, geodesy and photogrammetry.