3-DIMENSIONAL COMPUTER GRAPHIC MODELS BY ANALYTICAL PHOTOGRAMMETRY

This paper indicates the advantages afforded when an analytical plotte r is interfaced with a three dimensional CAD system. Problems associat ed with combining various data sources (ground survey, aerial and clos e range photography) of differing quality will be discussed, together with compromises required to idealize the geometry of the real would e nforced by a CAD system. The paper is illustrated by some of the comme rcial projects undertaken by the Engineering Photogrammetry Unit at Ci ty University. Applications of particular financial significance inclu de modelling of petro-chemical plant for different purposes and to var ious levels of derail and accuracy.