1. OGC® Land and Infrastructure Conceptual Model Standard (LandInfra) TC Briefing
97th OGC Technical Committee
Sydney, Australia
Paul Scarponcini
3 December 2015
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2. LandInfra Contributors
Paul Scarponcini (Editor) Hans-Christoph Gruler (Survey) Erik Stubkjær (Land) Peter Axelsson (Rail) Lars Wikstrom (Rail) Thomas Liebich (bSI) Chris Body Leif Granholm Orest Halustchak Johnny Jensen 73 SWG Observer Members Invited Guests, Presenters (ePlan) OGC Staff
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Introduction
Land and Infrastructure Conceptual Model Standard (LandInfra)
It’s all about the land upon which infrastructure facilities are built
and the infrastructure facility improvements themselves
including the surveying necessary for the construction and recording of the facilities and land interests
“use case driven subset of LandXML functionality, but that is implemented with the OGC Geography Markup Language (GML) and supported by a UML (Unified Modeling Language) conceptual model”
LandInfra is the conceptual model, specified as a proposed OGC Standard
An InfraGML encoding standard is to follow
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History
2013 – the LandInfraDWG was chartered to “focus on determining how best to integrate and support the LandXML schema within the OGC framework, as well as how to better manage and integrate CAD-based land information with other OGC standards.”
the LandInfraSWG began reverse engineering a conceptual model of what was in LandXML
This revealed a number of problems with LandXML as well as broad disparity with the OGC standards baseline.
The DWG approved the SWG recommendation (OGC r1) to develop a new standard instead of trying to modify LandXML
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2014 – the SWG developed the “OGC Draft LandInfra Conceptual Model” as OGC and released it for an initial RFC
2015 – significant revisions were made to the model content and it was decided to seek approval of just the conceptual model as an OGC standard, before any encodings were to be proposed
On December 1, the LandInfraSWG approved the submittal of the OGC® Land and Infrastructure Conceptual Model Standard (LandInfra) 1.0, (OGC ), for processing as an OGC standard
It also committed to begin the development of the InfraGML encoding based upon this Conceptual Model
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LandInfra Structure
LandInfra conforms to the OGC Modular Specification, including Requirements, Requirements Classes (RC) and Conformance Classes; Naming Authority, and format
The Target of the standard is the ensuing encodings.
A single, mandatory core RC includes concepts relevant across multiple other RCs.
Other RCs are optional, but must be supported in their entirety (i.e., all of their respective Requirements), as well as supporting all of the RCs they are dependent upon
This conceptual model is presented using UML Class Diagrams where the UML Classifiers (Classes) are to be interpreted as concepts, including properties and relationships; RCs are UML Packages
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7. LandInfra Content (RCs)
Facility
Project
Alignment
Road
Railway
Survey
Equipment
Observations
SurveyResults
Land Feature
Land Division
Condominiums
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Alignment
LandInfra is a significant contribution to the integration of GIS, CAD, and BIM
In Buildings, things are located in rooms on floors. For infrastructure facilities, things are located using linearly referenced locations along an “alignment”
To bring GML, civil, and IFC together for infrastructure facilities, a common conceptualization of alignment is required
This was developed jointly between OGC and the buildingSMART International (bSI) Infrastructure Room
The resultant, shared conceptual model has already been encoded by bSI as IfcAlignment and will be part of InfraGML
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Next steps
The LandInfraSWG will work through the OGC standards approval process
The SWG will begin development of the InfraGML encoding.
The OGC and bSI are committed to continue their work together to help insure the harmony of future extensions to LandInfra and the proposed projects of the bSI Infrastructure Room, such as Overall Architecture, IfcRoad, IfcRail, etc.
The SWG will continue its collaboration with the ePlan working group to strengthen the Land Division area
The LandInfraSWG will commence work on LandInfra extensions
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