[G-02] Information Design in the Contents of Earth Science and Education

[G02-P06] Integrating Analog and Digital: Creating of a Three-Dimensional Model of the Noto Peninsula, Japan, Based on the Red Relief Image Map and Implementation of Projection Mapping

*Hisashi Sasaki¹, Kaori Egawa¹, Akitoshi Morokuma¹, Ai Azato¹, Tatsuro Chiba¹, Kazuya Funakoshi¹, Tomonori Sakamoto², Eiichi Kishimoto², Kaisei Natsui², Yuka Takahashi² (1.Asia Air Survey Co., Ltd., 2.WEATHERCOCK Co., Ltd.)

Keywords:Public Awareness and Education, Projection Mapping, Three-Dimensional Model, Compound Disaster

Hazardous areas depicted on hazard maps are contingent on the topography, and comprehending the topography is essential for understanding hazard maps. However, current hazard maps frequently have two-dimensional (2D) representations, rendering it challenging to interpret terrain irregularities. Consequently, we developed public awareness content that combines a three-dimensional (3D) model of the Noto Peninsula in Japan that is based on the Red Relief Image Map (RRIM) method with projection mapping to communicate geospatial information on disaster prevention and the environment through the establishment of links with 3D topographical information. To date, this system has been utilized as a museum exhibit at Mounts Fuji and Hakusan, and a portable version has been developed for transporting the material and conducting lectures elsewhere (Egawa et al., 2024). Thus far, the primary aim of the content has been to disseminate disaster prevention awareness during non-emergency periods. In 2024, the Noto Peninsula experienced a series of earthquakes and torrential rainfall events, resulting in complex disasters. In this study, a 3D map of the Noto Peninsula and portable type projection mapping were established as tools for displaying pre- and post-disaster information (Figure1 and Figure 2). In addition to geospatial information maintained as open data, 16 types of content were created by incorporating open data on earthquakes and torrential rainfall disasters and information from the original analysis results of the authors. The eight types of content for the non-emergency periods were topographic maps, satellite images, color coded elevation maps, topographic classification maps, geological maps, l andslide topographic distribution maps, sediment disaster prone area maps, and population distribution maps. The six types of post-earthquake content were an epicenter distribution map, interferometric synthetic-aperture radar (SAR) data, ground displacement along both the vertical and horizontal directions, oblique photographs, and sediment transport distribution. Ground displacement was analyzed using aerial laser survey data collected before and after each earthquake (Sasaki et al., 2024). After the torrential rainfall in September 2024, the two types of content were oblique photographs and sediment transport distribution. Various types of information can be obtained by comparing the geospatial information before and after these disasters. For example, the geology, epicenter location, ground displacement, and other predisposing factors for many landslide disasters can be compared with the landslide disaster warning area, and the relationship between elevation differences and slope gradients can be assessed using the 3D model. This method—which combines the analog approach of 3D models with the digital method of projection mapping—has the potential to be utilized not only for public awareness during non-emergency periods but also as a tool for supporting disaster countermeasures. Overall, the combination of 3D topographic information with comprehensive visualization of information such as the location of disasters and traffic disruption points is considered an effective decision-making support tool for disaster management.