– an AR-tool for the documentation ofmaintenance and service procedures on recent smartphone systems,
– fusing 3D building models with semantic annotations as well as tracking reference data using REST technologies,
– realizing an AR-service based infrastructure that uses the smartphone for environment capturing and ARvisualization on the client while processing content and tracking reference models on the server,
– establishing a web compliant annotation engine that linksBIM and multi-media content to building parts supporting
real-time content authoring,
– enabling collaborative users to exchange annotations and link those to the building information model database in real-time, and
– downscaling markerless/large-area tracking technologies to smartphone devices and tablet-PCs.