Research projects – Geodetic Institute – Leibniz University Hannover

Deformation analysis based on terrestrial laser scanner measurements (TLS-Defo): Surface approximation uncertainty

In geodetic deformation analyses, we statistically test geometric changes in two or more states. To use the full potential of well-established surface-based measurement techniques such as terrestrial laser scanning (TLS) requires continuous local and global modeling of the monitored surface. The project on "surface approximation uncertainty" focuses on investigating the interaction between measurement and model uncertainties in the context of surface model selection. These components are closely connected, as the level of model uncertainty is directly influenced by the interaction between the complexity of the measured object, such as roughness and sharp edges, and the spatial density of measurement points across the object. To address this, the project distinguishes between three sub-topics: TLS uncertainty budget, model uncertainty, and the application of fractal geometry as a methodological tool to achieve the primary project goal.

Led by: Ingo Neumann, Mohammad Omidalizarandi

Team: Jan Hartmann

Year: 2023

Funding: DFG

Duration: 10/23 – 09/27
QViZO - Quality-oriented virtualisation of time-variable object spaces

The aim of the QViZO project is to shift location-based recording, administration and business processes from the local area to virtual space. Buildings, objects and structures are captured using multi-sensor systems, represented as coloured 3D point clouds and made available to users as an authentic digital twin for viewing, assessment and analysis. In order to guarantee a legally robust and technically reproducible level of object authenticity, it is necessary to describe when a virtual image can be legally equivalent to its real counterpart. This R&D project therefore aims to develop a novel procedure and a key technology for the quality-compliant virtualisation of time-variable object spaces. The target groups are in particular the construction and surveying industry, building owners and surveyors. The solution to be developed is intended to significantly reduce on-site appointments by enabling all parties involved to access the "digital twin" of the property virtually and from any location, so that a legally binding assessment and participation in business and administrative processes is possible.

Led by: Ingo Neumann

Team: Jan Moritz Hartmann

Year: 2020

Duration: 2020 -2022

Research projects of Jan Moritz Hartmann, M. Sc.