A Model-based, Optimal Design System for Terrestrial Laser Scanning Networks in Complex Sites

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dc.contributor.advisorLichti, Derek D.
dc.contributor.authorJia, Fengman
dc.contributor.committeememberO'Keefe, Kyle P. G.
dc.contributor.committeememberWang, Ruisheng
dc.contributor.committeememberShahbazi, Mozhdeh M.
dc.contributor.committeememberLindenbergh, Roderik C.
dc.date2019-11
dc.date.accessioned2019-09-04T15:00:29Z
dc.date.available2019-09-04T15:00:29Z
dc.date.issued2019-08-29
dc.description.abstractWith the rapid increase of terrestrial laser scanner (TLS) applications, especially for the high-accuracy modelling of large-volume, complex objects, a design system is required to provide the optimal solutions for both scanner and target placement, so that the project requirements in terms of coverage, precision, economy and reliability can be met. In this thesis, a model-based, optimal design system for terrestrial laser scanning networks in complex sites is proposed. First, a hierarchical TLS viewpoint planning strategy driven by an improved optimization method is developed to solve the optimal scanner placement problem. The main contribution of the proposed method is to improve the efficiency in design without jeopardizing the optimality of the solution, compared with the traditional method with the extensive search strategy. In addition, the target placement for registration, which draws limited attention in the existing research, is determined by optimizing the target arrangement criterion, and the number of target locations is minimized by accepting the close to optimal target arrangement. Finally, the quality of the design, including the sensitivity of the object coverage to viewpoint placement and the precision of the point cloud are provided. The proposed methods were verified by the relatively small network first and then applied on two building complexes located on the University of Calgary campus. The design for scanner placement was compared with the “brute force” strategy in terms of the optimality of the solutions and runtime. The results showed that the proposed strategy provided scanning networks with a compatible quality but a significantly improved efficiency in design. The number of target locations necessary for registration from the proposed system was surprisingly small, considering the volume and complexity of the networks. Through the quality assessments, the sensitivity of the object coverage to the scanner placement indicated where users might need to consider viewpoint densification, and the point cloud precision indicated if the network design could meet the project requirements.en_US
dc.identifier.citationJia, F. (2019). A Model-based, Optimal Design System for Terrestrial Laser Scanning Networks in Complex Sites (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/36932
dc.identifier.urihttp://hdl.handle.net/1880/110853
dc.language.isoengen_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectTerrestrial Laser Scanningen_US
dc.subjectNetwork Designen_US
dc.subjectView planningen_US
dc.subject3D Modellingen_US
dc.subjectPoint Clouden_US
dc.subject.classificationRemote Sensingen_US
dc.subject.classificationEngineeringen_US
dc.titleA Model-based, Optimal Design System for Terrestrial Laser Scanning Networks in Complex Sitesen_US
dc.typedoctoral thesisen_US
thesis.degree.disciplineEngineering – Geomaticsen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameDoctor of Philosophy (PhD)en_US
ucalgary.item.requestcopytrueen_US
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