Performance comparison of Geo-referencing a radar using prism method with global

Abstract: Monitoring of the surface operations using movement and surveying radar (MSR) can prevent loss of: life, equipment, production and loss of the mine. Slope monitoring using MSR is an important aspect of open-pit mining as it provides real-time movement of deformation data for the slope. It is therefore important that the radar is accurately geo-referenced in order to provide accurate real-time movement data. Geo-referencing is defined as the process of determining an instrument’s position (in the form of X, Y, Z) as well as the orientation with respect to the mine’s local coordinate system. This helps in getting geo-referenced data points from the radar that are identified by a unique set of coordinates in relation to the mine’s coordinate system which allows the radar to track movement for a specific set of coordinates. In this research, we assess the performance of geo-referencing a radar using the total station method and compare it with the integration of Advance Navigation – Spatial Dual system GPS connected via RS422. This includes assigning the Spatial Dual navigation coordinates (Easting, Northing and Height) output to the radar’s azimuth and elevation (Az, El and Range) coordinates from the motor encoders. Furthermore, a comparison of key attributes of both methods of geo-referencing methods is performed using a matrix system and giving an overall performance appraisal of both systems. Integrating a navigation system allows the radar to have an auto geo-referencing functionality that will reduce the time spent in completing this process. The findings reveal that the GPS obtained a higher score than the total station with prism method on the weighted matrix system....M.Tech. (Electrical and Electronic Technology

An integrated information modelling system for assessing urban geohazard risk

Over the years, the continuous expansion of cities has drawn the attention of engineers and researchers to the need to support sustainable planning. As cities expand, they would be more prone to geohazard risk, which could cause severe costs. Therefore, a system to provide information of geohazard risk could support sustainable urban planning. A suggested application is proposed in this thesis to assess settlement risk caused by tunnelling. A framework methodology is proposed to aid the assessment of urban geohazard risk. The settlement risk assessment analyses and the associated building damage and cost assessment form the structure of the framework. Building Information Modelling (BIM) provided and supported the information for the data processes used in the whole analysis and the 3D geology-tunnel-building model creation. The resulting risk assessments are presented using 3D visualisations. From these visualisations, further investigations could be focused on the ‘higher-risk’ outcomes presented. This forms a preliminary assessment a tool. The final oucome of this research is an integrated information system based on advanced analysis and 3D modelling tools for urban geohazard risk. The research also provides information which contributes to knowledge and understanding for relevant associated problems and supports sustainable decision-making