Because engineering work sites have longer work process days and are more complicated than other industrial sites, it is difficult to conduct integrated management, process control, and quality control until completion, and so many problems are occurring. If quick decision- making is not realized or accurate site information is not provided, huge economic loss can be generated due to poor supervision and site control, and subcontractor’s poor management.
Therefore, it is needed to develop a system for users to get accurate information about construction sites and grasp the construction progress regardless of their locations.
Thus, the purpose of this study was to establish the GIS system to comprehensively manage engineering work sites and monitor site information at any time. In other words, this study, by using unmanned aerial measurement and GPS measurement, tried to develop a system to deal with 3-dimensional spatial data quickly and precisely, to manage, report, and inquire into main designs, construction drawings, processes, and construction costs anytime and anywhere, and to comprehensively manage and grasp engineering work sites.
The unmanned aerial image processing and photography system in this study includes existing spatial data processing technique/unmanned aerial image characteristics, work plan establishment, orientation elements determination, camera test, image data acquisition, and coordinate conversion, and site works include design drawings, working processes, and work reporting. In addition, 3-dimensional spatial data processing conducts and produces data processing, precision analysis, construction maps, longitudinal drawings, cross-sectional drawings, contour maps, digital terrain models, and ortho-photos, and the system design and development aimed to provide accurate site information such as work progress states and cost analysis by applying response type webs for use on various devices such as PC and smartphones.
As a result of the study, it could be found that the system can provide the latest information process control, construction progress confirmation, and prevention of safety accidents for quick decision- making from planning to completion at engineering work sites, and can objectively judge site conditions by overlapping high resolution 3-dimensional spatial data and design drawings. And it also can provide various data such as mass tables, detailed statements, and ground level changes quickly by producing construction maps, longitudinal drawings and cross-sectional drawings. In short, the IT and GIS-based site management system at engineering work sites can enable users to check and manage rapidly changing construction sites through the latest 3-dimensional spatial data by using PC, smartphones, and smart-pads anytime and anywhere.