Abstract
Abstract. Indoor environments differ from outdoor in many aspects. This, added to the limitations faced by other common standards for urban features reinforced the need of setting a dedicated standard for indoor applications. IndoorGML was born in this context to provide the basic concepts, data models, and standard that meet the requirements of indoor spatial applications. Indoor spatial information can be generally classified into two categories: indoor objects such as architectural components (walls, stairs, slabs) and interior facilities (furniture); indoor spaces such as cavities (rooms and corridors) or virtual subdivision (sensor and legal spaces). Handling both information is necessary to support applications ranging from Indoor location-based services (LBS), indoor route analysis or indoor geo-tagging to building and asset management. In this paper, we present the proposed changes to the second version of IndoorGML, under preparation and intended to provide the necessary support for applications using information from those two categories. IndoorGML 2.0 is open to all applications that rely on indoor spaces and require analysis that can be performed on a network, extracted from those spaces utilizing neighbourhood relationships. It follows a model-driven approach, i.e. all concepts are presented by the Unified Modelling Language, from which technical implementations are derived (GML, JSON, SQL, etc.). We present the proposed changes to the previous version, illustrate a way of representing indoor objects other than spaces and discuss several use cases of the standard.
Highlights
IndoorGML is an Open Geospatial Consortium (OGC) standard that focusses on the representation and exchange of the 2D and 3D indoor environment (Li, 2016, Li et al, 2019)
We introduced several changes and improvements that are being considered and implemented in the IndoorGML2.0 standard proposal
The previous version of the standard is simplified and number of inconsistencies are removed, some classes are renamed for the sake of clarity, some classes are represented as attributes, and these latter and their related code lists are specified
Summary
IndoorGML is an Open Geospatial Consortium (OGC) standard that focusses on the representation and exchange of the 2D and 3D indoor environment (Li, 2016, Li et al, 2019). In addition to the semantic, geometric and topological representations, IndoorGML is characterized by powerful concepts such as the Cellular description of the space which allows to describe the space with different level of granularity and the Multilayer concept (Becker et al, 2009) which allows the representation of different thematic layer types (e.g. topographic, sensor coverage, etc.) for the same space (IndoorGML, 2014, Kang, Li, 2017) Througout the years, it received considerable attention from the indoor spatial community, for a wide range of use cases, extension proposal and comparison/integration to other standards, etc. Those use cases include: the extraction of CellSpace elements form common compatible standards such as IFC, the generation of different type of models with different complexity (topology only, topology and semantic, geometry and semantic, etc.) to illustrate the flexibility of the standard
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