Presentation Title

Unmanned Aircraft Systems in Civil Engineering applications

Faculty Mentor

Omar Mora

Start Date

17-11-2018 10:15 AM

End Date

17-11-2018 10:30 AM

Location

C302

Session

Oral 2

Type of Presentation

Oral Talk

Subject Area

engineering_computer_science

Abstract

Three-dimensional city modeling has gained interest recently due to its useful applications. It plays an important role in decision making and can be used comprehensively for urban planning analysis, disaster management, tourism, and other fields. One particular field where it is highly important is in civil and construction engineering. The opportunity to utilize such information has not only improved efficiency but provided the opportunity to explore innovative solutions and offer alternate options in decision making. Unmanned Aircraft Systems (UAS) are emerging as an alternative tool for mapping and modeling cities at a medium scale. The investigation of the dense point clouds created from imagery acquired by these systems is required to understand the limitations and accuracy of the derived product. For this reason, an analysis was performed to test and evaluate the capabilities of UAS based mapping for city modeling and surface reconstruction. In this study, a UAV was flown over the Westland Building Group in Ontario, CA. The drone collected overlapping images during a preset trip using a compatible IOS application, which were processed using software called ContextCapture. The UAS image-based results are compared to a high-resolution surface model that was acquired by Terrestrial Laser Scanning (TLS). At this point in the research, the data is being compared between the two systems, by performing a cloud to cloud comparison on CloudCompare. This study intends to compare UAS based mapping methods with laser scanning techniques and aims to demonstrate that in some cases, the UAS based mapping may be a more cost-effective alternative for 3D city modeling.

Summary of research results to be presented

With the increased reliance on technology, three-dimensional modeling of as-built structures and cities became a necessary essence of today’s business and engineering applications. The Unmanned Aircraft Systems (UAS) is a promising resource that has so far demonstrated a substantial role in making three-dimensional models a cost-efficient and reliable tool. Based on literature research and similar experiments, UAS can create surface models able to provide elevation and terrain information, which are used as a platform for projects’ development. Also, some studies have proven UAS ability in assessing the safety of civil infrastructure by measuring dynamic vibrations of structures. Although structural assessment via imagery is not a new technology; the mobility of the UAS opened a new window of opportunity to capture the structure’s motion using a less constrained equipment. Another application of UAS resides in precision agriculture, forest monitoring, and water quality inspections. The UAS can be automated to fly and capture a set of images along a certain path, to be later processes, georeferenced, and utilized to perform environmental assessments. Further applications of UAS involve surveying and property separation. Depending on the target accuracy and precision, the images could be georeferenced using ground control points – points of know elevation and coordinates – then utilized to determine property area, spaces, and borders. Given this wide variety of applications, the UAS remains a technology under investigation. Although it is more efficient than the traditional Terrain Laser Scanner, its accuracy is yet to be fully assessed.

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Nov 17th, 10:15 AM Nov 17th, 10:30 AM

Unmanned Aircraft Systems in Civil Engineering applications

C302

Three-dimensional city modeling has gained interest recently due to its useful applications. It plays an important role in decision making and can be used comprehensively for urban planning analysis, disaster management, tourism, and other fields. One particular field where it is highly important is in civil and construction engineering. The opportunity to utilize such information has not only improved efficiency but provided the opportunity to explore innovative solutions and offer alternate options in decision making. Unmanned Aircraft Systems (UAS) are emerging as an alternative tool for mapping and modeling cities at a medium scale. The investigation of the dense point clouds created from imagery acquired by these systems is required to understand the limitations and accuracy of the derived product. For this reason, an analysis was performed to test and evaluate the capabilities of UAS based mapping for city modeling and surface reconstruction. In this study, a UAV was flown over the Westland Building Group in Ontario, CA. The drone collected overlapping images during a preset trip using a compatible IOS application, which were processed using software called ContextCapture. The UAS image-based results are compared to a high-resolution surface model that was acquired by Terrestrial Laser Scanning (TLS). At this point in the research, the data is being compared between the two systems, by performing a cloud to cloud comparison on CloudCompare. This study intends to compare UAS based mapping methods with laser scanning techniques and aims to demonstrate that in some cases, the UAS based mapping may be a more cost-effective alternative for 3D city modeling.