Abstract
Managing geo-based indoor content is important, because the components used to construct an urban environment are complex. Geospatial data are available worldwide, but services are tailored only to local features. As the accuracy of online maps increases, the buildings in a web-mapping service can be created exactly as they are, in terms of actual features and geometric properties, and can provide some information on indoor elements. Nevertheless, not many practical use cases exist, as the available scope and volume of indoor content are limited. In Korea’s metropolitan areas, an indoor geospatial information management scheme was built to manage internal facility information for public and underground buildings on a three-dimensional (3D) basis and to provide online visualization services for users. Based on this enterprise system for public use of indoor 3D content, we conducted a case study with add-on features to manipulate and manage data by adding two-dimensional (2D) building data that are linked to the 3D models. We also changed the classification system of the points of interest (POIs) for each internal facility. To enhance public usability, a portion of the usable information in this scheme can be offered via an open application programming interface (Open API). To create a 2D POIs obtained from an indoor 3D object that was provided as a relative coordinate with only 3D geometric features, several steps were needed: adding the object to the system, storing the object as an absolute coordinate, and linking the object with an outdoor mapping service. In addition, to provide more useful information about indoor POIs generated from 3D models for users, detailed information should be further managed by directly using the Open APIs designed in this study. Subsequently, a mobile web mapping service system to visualize indoor contents was deployed to deliver practical processing and improvements based on the deployed Open API. The possibility of effective management and application of POIs related to indoor contents was confirmed through the mobile web-mapping demo service that was established using Open API.
Highlights
IntroductionAs building technologies develop and the area of indoor spaces grows, many facilities and services can be provided inside a building
Most people in urban areas spend more time inside than outside
The 2D points of interest (POIs) database generation process includes 3D building object information such as walls, windows, and stairs used for 3D modeling, and building reference point information that consists of absolute coordinates
Summary
As building technologies develop and the area of indoor spaces grows, many facilities and services can be provided inside a building. Most geospatial information services available to public users are outdoor mapping services that include navigation for locating buildings or specific areas, or directions to a certain place. Information about the installation and inside space of a building is important if a disabled person uses the building or if an emergency occurs. The general services offered in most geospatial information fields are typically close to outdoor spaces. Research has been performed to classify indoor space models for indoor emergency situations [4]. Open community projects such as Open Street Map (OSM) [5] have been established. Regarding points of interest (POIs) in the geospatial application field, POI analysis or search has been studied, rather than POI generation and the design of its attributes [6,7,8]
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