Harmonising the OGC Standards for the Built Environment: A CityGML Extension for LandInfra

Kavisha Kumar,Jantien Stoter,Hugo Ledoux,Anna Labetski,Ken Arroyo Ohori

doi:10.3390/ijgi8060246

Abstract

The relatively new Open Geospatial Consortium (OGC) standard LandInfra documents in its data model land and civil engineering infrastructure features. It has a Geography Markup Language (GML) implementation, OGC InfraGML, which has essentially no software support and is rarely used in practice. In order to share the benefits of LandInfra (and InfraGML) with a wider public, we have created the Infra Application Domain Extension (ADE), a CityGML ADE that allows us to store LandInfra features in CityGML. In this paper, we semantically map LandInfra to CityGML, describe our ADE, and discuss a few used cases where our ADE can be useful for applications for the built environment. We also provide software to automatically convert datasets from InfraGML to CityGML (and our ADE), and vice versa, as well as to validate them, which will help practitioners generate real-world InfraGML datasets.

Highlights

LandInfra [1] is a relatively new Open Geospatial Consortium (OGC) open standard for land and infrastructure features, integrating concepts from Building Information Modelling (BIM) and Geographical Information Systems (GIS)
In order to support LandInfra concepts in CityGML, we have developed the Infra Application Domain Extension (ADE), which is able to store and manage LandInfra/InfraGML datasets in CityGML with full compatibility
We have implemented the ADE and we provide the Unified Modelling Language (UML) model, the XML Schema Definition (XSD) schema, the documentation and a prototype software, which are all publicly available in our GitHub repository: https://github.com/ tudelft3d/city2InfraGML

Summary

Introduction

LandInfra [1] is a relatively new Open Geospatial Consortium (OGC) open standard for land and infrastructure features, integrating concepts from Building Information Modelling (BIM) and Geographical Information Systems (GIS). It partially overlaps the main standard of the 3D GIS world, CityGML, such as in its thematic classes Building, Road and Railway (Transportation in CityGML), and LandSurface (ReliefFeature in CityGML) [1]. CityGML [2] is an open standard from the OGC for the storage and exchange of 3D city models, including their geometry, semantics, and graphical appearance It is implemented as an application schema of the GML version 3.1.1 [3].

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Conclusion