CLASSIFICATION OF DATA CAPTURING AND BUILDING SURVEYING TECHNIQUES IN THE CONTEXT OF SELECTING THE OPTIMAL METHOD OF CREATING 3D BIM AND HBIM MODELS OF EXISTING BUILDINGS

When creating a BIM information model of an existing building, a number of surveying techniques may be applied. The choice of particular technique depends largely on the budget of the investor commissioning the task and, on the specialist, commissioned to do it. Methods of conducting very accurate architectural survey and creating a digital 3D model are still fairly expensive due to the need of using specialist equipment. On the other hand, more common and affordable methods often lack the accuracy in the final model. This paper attempts to present a new classification of data capturing and building surveying techniques for creating 3D BIM models of existing buildings. The authors discuss optimal ways of applying particular methods and combining them so as to reduce the overall cost of the commissioned task and to achieve high accuracy of the final model at the same time. The analysis presented in this paper allows to introduce some order in the methods of creating BIM models of existing buildings by offering a new classification adjusted to standards currently used in architectural surveying.