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3D Laser Scanner Survey and 3D Printed Model Production of the Former Kakogawa Library
1. Background of the Project
This project was initiated after Hyogo Prefectural Toban Technical High School was selected as a "Smart Vocational School" by Japan’s Ministry of Education in 2021, enabling the introduction of 3D laser scanning technology. The aim was to digitally archive the former Kakogawa Library, a building designated as an important cultural asset for landscape formation. Built over 80 years ago, the library has been a landmark in the city, but concerns over its structural integrity have prompted discussions on its future preservation. The building is also historically significant as the site where author Yukio Mishima underwent his conscription examination during the war.
Eight third-year students from the Architecture Department’s “FabLab Studio Toban” conducted the 3D laser scanning survey to accurately capture the library’s architectural features (Figure 1). This report outlines the survey process and the creation of a 3D printed model.
2. Purpose of the Project
The objectives of this project include:
To record the architectural shape of the former Kakogawa Library using 3D laser scanning and preserve it as digital data.
To create a 3D printed model from the point cloud data, which will be used for educational purposes and to raise awareness of local heritage.
To provide students with an opportunity to learn and practise methods of cultural heritage preservation using digital archiving technology.
3. Implementation of 3D Laser Scanning Surveying
Equipment Used
3D Laser Scanner: Leica RTC360
Data Processing Software: Leica Cyclone REGISTER 360, Autodesk ReCap
Surveying Procedure
Site Survey and Preparation: The exterior and interior of the library were carefully examined to determine optimal scanning positions (Figure 2).
Conducting the Scan: The students captured precise point cloud data from 150 locations, covering both the exterior and interior, including detailed features such as the ceiling void and original architectural elements.
Data Integration and Processing: The collected data was processed using Leica Cyclone REGISTER 360 and Autodesk ReCap to create an accurate 3D model of the building.
Creation of 3D Printed Model: Using the point cloud data, CAD drawings were made, and the model was converted to STL format for 3D printing. Components were printed using bio-plastic (PLA), assembled, and post-processed to create a physical model.
4. Results and Discussion
The project successfully demonstrated the value of 3D laser scanning in architectural education and cultural heritage preservation. The students gained hands-on experience with the latest surveying technologies, and the 3D printed model was used for educational outreach and displayed at various local events (Figure 3). The digital archive and the model were donated to the Kakogawa City Construction Department (Figure 4) and displayed at the Kakogawa Library.
5. Future Prospects
Plans are in place to expand the digital archiving approach to other cultural heritage buildings in the region, potentially integrating VR/AR content for further educational use (Figure 5). Continued collaboration with local cultural heritage institutions is also planned to enhance community engagement and further the preservation of historical buildings.
6. Conclusion
This project highlights the importance of using modern technologies like 3D laser scanning and 3D printing for the preservation of cultural heritage. It has provided a valuable learning experience for students and contributed to the local community’s understanding of architectural heritage. The project also serves as a model for integrating digital technologies into vocational education, with a focus on cultural heritage preservation.
Project Period: 1st April 2022 – 31st March 2023Location: Former Kakogawa LibraryParticipants: 8 students, Instructor Hironori Ohtoshi
