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Creation of GDL objects with embedded LEED information

O'Keeffe, S., Shiratuddin, M.F. and Fletcher, D. (2010) Creation of GDL objects with embedded LEED information. Journal of the Mississippi Academy of Sciences, 55 (1). p. 110.

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The Geometric Description Language (GDL) is a computer-programming language that allows for the creation of Graphisoft’s ArchiCAD GDL based object libraries. GDL objects are parametric objects and they contain all the information required to describe building elements such as 3D geometric model, 2D CAD symbols and texts. The information in GDL objects is organized in a tree hierarchy based on the Industry Foundation Class (IFC) schema. Using GDL objects allow the creation of many additional building information and parameters that can be embedded into model elements present in designs. In this paper, we describe two methods for the creation of custom GDL objects; (1) utilizing GDL script and (2) modeling the 3D object using 3D modeling software such as Autodesk 3D Studio Max. We also described the creation of LEED (Leadership in Energy and Environmental Design) related model element parameters using the Vico Constructor software, and LEED model element recipes using the Vico Estimator software. We have developed a prototype 3D model that contains GDL objects embedded with LEED related information and actual cost of products. We are currently creating new LEED related IFC sub-set schemas so that sustainable built environment information can be interoperable and interchangeable.

Publication Type: Journal Article
Publisher: Mississippi Academy of Sciences
Notes: Abstract from the 75th Meeting of the Mississippi Academy of Sciences
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