3d plant models derived by analytical photogrammetry and their use in the preparation of area classification drawings

This paper describes how analytical photogrammetry was used to produce accurate 3D computer-aided design (CAD) models representing a large volume of chemical plant. Additional engineering information was added to these models and used to generate area classification drawings. This approach was found to be the most efficient means of producing such drawings, increasingly necessary to satisfy legislation on emissions and plant operating permits. Traditional methods of producing area classification drawings are reviewed, followed by an overview of requirements of a photogrammetric survey. Application at the Monsanto plant in Antwerp is used to illustrate the methodology. The importance of photogrammetry to this type of application and to the petrochemical industry in general is discussed.