Prof. K S Rajan and Prof. Ravoori Nagaraja along with V Tejaswini, IIITH and National Institute of Rural Development and Panchayat Raj (NIRDPR), Hyderabad; Pyla Kesava Rao, Centre for Geo Informatics Application in Rural Development (CGARD) and National Institute of Rural Development and Panchayat Raj, Hyderabad; E N Dhanamjaya Rao, Department of Geology, Andhra University, Visakhapatnam; S K Sinha, National Institute for Geo-Informatics Science and Technology (NIGST), Survey of India, Uppal, published the following two paper in Recent Advances in Civil Engineering – Lecture Notes in Civil Engineering, vol 233. Springer, Singapore: 

• Generation of LOD-2 3D Building Models from High-resolution Stereo Satellite Data Using Remote Sensing and Photogrammetry

Research work as explained by the authors: Building products designed at each level of detail provide single window solutions for Smart City applications. In view of this, the current study uses the tools and techniques to generate a second level of detailed buildings that include building shape and height parameters. The extrusion from 2D has been performed altogether in multiple platforms and 3D data handling software. The basic inputs considered for extracting the polygon shapefiles are obtained from high-resolution stereo pair satellite images acquired using Cartosat-I imagery. Eight ground control points are collected using a high precision Differential Global Positioning System having millimeters of accuracy. The image adjustments and Digital Surface Model are generated by using the process and concepts of Photogrammetry such as block creation using Rational Polynomial Coefficient text files, internal geometry set up such as interior and exterior orientation, Tie point generation and control point adjustments, and Automated Terrain Extraction. The thus obtained terrain model is overlaid on ortho photographs and the building heights are extracted and compared by using spatial profile graph as well as stereoscopic visualization methods. The height-derived attribute tables are attached to corresponding building footprints and are visualized in different GIS platforms.

Full paper: https://doi.org/10.1007/978-981-19-0189-8_5

• A BIM-Based Approach of Electrical Network Analysis and Applications Using GIS Tools

 Research work as explained by the authors: Building Information Modeling is a sophisticated technology possessing intellectual tools that help planners and architects to design sustainable buildings and carry out performance analysis based on various aspects. Apart from the existing building elements, a network connecting each building component is of vital importance in order to generate organized plans. Building Information Modeling when embedded with Geographic Information System delivers versatile applications in the world of both Geo Spatial field of studies as well as Architecture, Engineering and Construction Industry. The current research is one such attempt to understand the power of Geographic Information System tools in building models especially in solving complicated network connections. Designing the electrical network and planning the circuitry information in such a way so as to avoid faulty or poor connections in between the inter circuit elements is successfully achieved with the help of this integration. Initially, the building model is generated to the high level of detail and electrical fixtures are organized within a power distribution system using Revit Architecture. The virtual network wiring made in the Building model is physically connected using three dimensional Polyline features in Geographic Information System platform and the created Network of electrical elements is utilized for Geometric Network Analysis.

Full paper: https://doi.org/10.1007/978-981-19-0189-8_4