Graph representations and methods for querying, examination, and analysis of IFC data

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

2019

Self Cite

<p><strong>Abstract.</strong> We employ a triple graph grammar to enable configurable conversion from IFC to CityGML. In this paper, we present the mathematical framework behind the graph transformation approach as well as an application to create, store and maintain transformation rules implementing this framework. Particular emphasis is put on how the approach enables graphical representation and static analysis of rules and rulesets, both in the theoretical framework and prototypical implementation. Even if various publications and tools for general graph transformation do already exist, we hope that the BIM–GIS community will benefit from a domain-specific introduction to the theory and dedicated software tools.</p>

Section: Related Workmentioning

confidence: 99%

Creating and Maintaining Ifc–citygml Conversion Rules

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

2019

Self Cite

“…For the diagrams in this article, we follow the convention to integrate the depiction of object and type graph together with the morphism by labelling the nodes and edges with their respective types 1 . A more detailed description of the mathematical model and diagrammatic representations is given by Tauscher and Crawford (2018) and Tauscher (2019).…”

Section: Introductionmentioning

confidence: 99%

A modular graph transformation rule set for IFC‐to‐CityGML conversion

Lim

Stouffs

2021

Transactions in GIS

Conversion of Industry Foundation Classes (IFC) building models into CityGML city models is one of the operational scenarios for BIM–GIS integration, with a variety of applications producing and consuming data on either side. Given the in‐depth cross‐domain knowledge required to specify such conversions, the heterogeneity of the IFC input data and the use cases for the resulting CityGML, flexible and configurable solutions are needed that make conversion details accessible to domain specialists. Graph transformation as a conversion method fulfils these requirements. We propose to extend the modularity given by single transformation rules at a more coarse‐grained level and identify four layers with modules of associated rules. We describe a self‐contained set of rules across these modules and demonstrate its application to a range of building models.

“…Each node and edge is annotated with the name of its type. This visual notation and the graph model behind typed graph transformation rules has been described in detail for the IFC part [42] and applies similarly to the CityGML graph.…”

mentioning

confidence: 99%

Achieving Complete and Near-Lossless Conversion from IFC to CityGML

Stouffs

Biljecki

2018

IJGI

The Singapore Government has embarked on a project to establish a three-dimensional city model and collaborative data platform for Singapore. The research herein contributes to this endeavour by developing a methodology and algorithms to automate the conversion of Building Information Models (BIM), in the Industry Foundation Classes (IFC) data format, into CityGML building models, capturing both geometric and semantic information as available in the BIM models, and including exterior as well as interior structures. We adopt a Triple Graph Grammar (TGG) to formally relate IFC and CityGML, both semantically and geometrically, and to transform a building information model, expressed as an IFC object graph, into a city model expressed as a CityGML object graph. The work pipeline includes extending the CityGML data model with an Application Domain Extension (ADE), which allows capturing information from IFC that is relevant in the geospatial context but at the same time not supported by CityGML in its standard form. In this paper, we elaborate on the triple graph grammar approach and the motivation and roadmap for the development of the ADE. While a fully complete and lossless conversion may never be achieved, this paper suggests that both a TGG and an ADE are natural choices for supporting the conversion between IFC and CityGML.